Supplement Facts
Serving Size: 1 Capsule
Amount Per Serving
%DV
Quercetin
500 mg
†
The product is found useful for the following medical conditions
Asthma details
SCIENTIFIC SCORE
Moderately Effective
Based on 10 Researches
8.7
USERS' SCORE
Good
Based on 23 Reviews
8.7
9
We explored how quercetin, a natural compound found in fruits and vegetables, can impact asthma symptoms. Using an ovalbumin-induced mouse model of asthma, we aimed to uncover whether quercetin can help inhibit a process known as ferroptosis, potentially offering a new therapeutic approach for asthma sufferers.
Our findings showed that quercetin effectively reduced inflammation in the asthmatic mice. Specifically, it lowered levels of inflammatory factors such as IL-4, IL-5, and IL-13—substances typically elevated during an asthma attack. Notably, we also observed that quercetin increased the levels of superoxide dismutase, an important antioxidant, while decreasing malondialdehyde and ferric ions that are associated with oxidative stress.
Additionally, quercetin appeared to boost the expression of key proteins involved in defending against oxidative stress, specifically SIRT1, Nrf2, and HO-1. This suggests that quercetin not only helps combat inflammation but may also protect against cellular damage within the lungs. Overall, our study indicates that quercetin holds promise as a beneficial treatment for asthma by addressing both inflammatory and oxidative stress pathways.
Our findings showed that quercetin effectively reduced inflammation in the asthmatic mice. Specifically, it lowered levels of inflammatory factors such as IL-4, IL-5, and IL-13—substances typically elevated during an asthma attack. Notably, we also observed that quercetin increased the levels of superoxide dismutase, an important antioxidant, while decreasing malondialdehyde and ferric ions that are associated with oxidative stress.
Additionally, quercetin appeared to boost the expression of key proteins involved in defending against oxidative stress, specifically SIRT1, Nrf2, and HO-1. This suggests that quercetin not only helps combat inflammation but may also protect against cellular damage within the lungs. Overall, our study indicates that quercetin holds promise as a beneficial treatment for asthma by addressing both inflammatory and oxidative stress pathways.
10
Expedites relief
Most Useful Review
96 people found this helpful
Today is my first day in ages without using my inhaler, thanks to quercetin. It opens up my lungs, even during an asthma attack, in just a few minutes. I love it!
Bronchitis details
SCIENTIFIC SCORE
Moderately Effective
Based on 6 Researches
8.2
USERS' SCORE
Good
Based on 3 Reviews
8.7
9
Quercetin shows promise for bronchitis
We aimed to gather insights into how quercetin, a component of the herbal preparation Feining Keli (FNKL), may influence chronic bronchitis (CB) treatment. In our study, a rat model of CB was created using a combination of nasal drops of lipopolysaccharide (LPS) and smoking exposure. This model allowed us to evaluate the effectiveness of FNKL in a controlled environment, assessing behavioral changes, body mass, and lung health through various examinations.
Our findings indicated that FNKL has positive effects on CB, showing a potential benefit in alleviating symptoms. One crucial element we identified was quercetin-3-galactoside, which appears to play a significant role in FNKL's effectiveness. We discovered that quercetin might help by reducing inflammation and oxidative stress while regulating metabolic activity associated with bronchitis.
However, it’s important to note that while quercetin is active within the FNKL complex, our study does not isolate its effects from other ingredients. This means that while its importance is highlighted, we cannot conclusively determine quercetin’s standalone effectiveness in treating bronchitis.
Our findings indicated that FNKL has positive effects on CB, showing a potential benefit in alleviating symptoms. One crucial element we identified was quercetin-3-galactoside, which appears to play a significant role in FNKL's effectiveness. We discovered that quercetin might help by reducing inflammation and oxidative stress while regulating metabolic activity associated with bronchitis.
However, it’s important to note that while quercetin is active within the FNKL complex, our study does not isolate its effects from other ingredients. This means that while its importance is highlighted, we cannot conclusively determine quercetin’s standalone effectiveness in treating bronchitis.
10
Improved breathing
Most Useful Review
20 people found this helpful
WHERE HAVE YOU BEEN ALL MY LIFE? I've suffered from perennial rhinitis and have struggled with bronchitis due to post-nasal drip. After taking Nasonex, I sought an alternative and found this product. After three days, my breathing is now completely unobstructed. This Quercetin formula seems more potent than others I've tried. It’s a wonderful product!
Chronic Cough details
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Good
Based on 4 Reviews
8.6
8
We examined how quercetin, a natural compound, can help alleviate chronic cough by targeting P2X3 receptors, which are involved in cough reflexes. The study involved testing its effects on male mice and guinea pigs.
Results showed that quercetin effectively modulated these receptors without causing adverse taste effects, unlike other drugs like gefapixant. This potential opens up new avenues for treating chronic cough without unpleasant side effects.
Results showed that quercetin effectively modulated these receptors without causing adverse taste effects, unlike other drugs like gefapixant. This potential opens up new avenues for treating chronic cough without unpleasant side effects.
9
Cough alleviation
Most Useful Review
5 people found this helpful
It helped immensely! Quercetin is well-known for its benefits. I purchased it for my mother, who has struggled with chronic cough due to allergic asthma for many years. After she began taking Quercetin, she stopped using her cough spray, and her cough and episodes diminished.
Cough details
SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8.5
USERS' SCORE
Good
Based on 12 Reviews
8.6
8
We uncovered how quercetin, alongside a specialized compound called PSFL2915, affects chronic cough by interacting with a specific part of a receptor known as P2X3.
Our tests showed that quercetin could effectively reduce coughing in male mice and guinea pigs without causing taste disturbances—a drawback seen with other similar medications.
This suggests that quercetin could be a promising alternative to existing treatments for chronic cough, offering a potential new avenue for relief.
Our tests showed that quercetin could effectively reduce coughing in male mice and guinea pigs without causing taste disturbances—a drawback seen with other similar medications.
This suggests that quercetin could be a promising alternative to existing treatments for chronic cough, offering a potential new avenue for relief.
10
Quick recovery
Most Useful Review
24 people found this helpful
It works! Yesterday, I felt awful, wheezing at night and coughing up green mucus. I took my last two capsules along with two NACs and one Zinc. Within three hours, I felt much better. I'm delighted; I was not looking forward to being off work again! This is my second bottle, and I will keep taking it.
Psoriasis details
SCIENTIFIC SCORE
Possibly Effective
Based on 3 Researches
7.7
USERS' SCORE
Good
Based on 2 Reviews
8.6
7
We set out to explore the therapeutic impact of quercetin on psoriasis and how it interacts with a specific signaling pathway known as PI3K/AKT/GLUT1, which plays a critical role in inflammation and immune responses. Using a mouse model of psoriasis induced by imiquimod, we carefully assessed the effects of quercetin on skin lesions and associated histopathological features.
To deepen our understanding, we evaluated human keratinocyte cells (HaCaT) to see how quercetin influenced cell proliferation and apoptosis. Our findings indicated that quercetin appeared helpful in reducing the symptoms of psoriasis and that it had a notable effect on signaling through the PI3K/AKT/GLUT1 pathway.
Overall, the results suggest that quercetin could be a promising candidate for treating psoriasis, marking a step forward in potential therapeutic options. As we continue to investigate this area, these insights may pave the way for more targeted treatments in the future.
To deepen our understanding, we evaluated human keratinocyte cells (HaCaT) to see how quercetin influenced cell proliferation and apoptosis. Our findings indicated that quercetin appeared helpful in reducing the symptoms of psoriasis and that it had a notable effect on signaling through the PI3K/AKT/GLUT1 pathway.
Overall, the results suggest that quercetin could be a promising candidate for treating psoriasis, marking a step forward in potential therapeutic options. As we continue to investigate this area, these insights may pave the way for more targeted treatments in the future.
9
Very effective
Most Useful Review
Helped a lot with my psoriasis.
Acne details
SCIENTIFIC SCORE
Possibly Effective
Based on 6 Researches
7.8
USERS' SCORE
Good
Based on 2 Reviews
8.5
9
We examined how quercetin, a popular plant-based antioxidant, affects skin inflammation caused by the acne-causing bacteria Propionibacterium acnes. Through both laboratory and mouse studies, we found that quercetin significantly decreased inflammation-related proteins and cell responses triggered by this bacteria. When tested on mice, quercetin reduced swelling and redness at the injection site. These findings suggest that quercetin could serve as a beneficial treatment option for acne-related inflammation, opening doors for its use in skin care products and therapies.
9
Cleared acne effectively
Most Useful Review
The best, pure, effective Jarrow quercetin is of excellent quality and works remarkably against allergies. It cleared my facial skin within three days after years of battling acne, which was clearly caused by allergic reactions to certain foods. This specific quercetin has also noticeably made my skin look more youthful, spotless, and radiant. All in all, a fantastic product.
Adenoiditis details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.5
9
Throat sensitivity improved
Most Useful Review
1 people found this helpful
High quality; my parents take it, and my mum's throat sensitivity has vastly improved after half a year of consumption.
Cold Sores details
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9.5
USERS' SCORE
Good
Based on 2 Reviews
8.5
9.5
We investigated the effectiveness of the herbal treatment Gene-Eden-VIR/Novirin for managing cold sores. Our study involved a retrospective chart review with 68 participants who took 1 to 4 capsules daily over varying periods.
The results were promising, showing that 89.3% of participants benefited. The treatment significantly reduced both the number and duration of outbreaks compared to control groups. Gene-Eden-VIR/Novirin also outperformed traditional medications like acyclovir and valacyclovir without any side effects.
We strongly suggest considering Gene-Eden-VIR/Novirin as a preventive option for oral herpes.
The results were promising, showing that 89.3% of participants benefited. The treatment significantly reduced both the number and duration of outbreaks compared to control groups. Gene-Eden-VIR/Novirin also outperformed traditional medications like acyclovir and valacyclovir without any side effects.
We strongly suggest considering Gene-Eden-VIR/Novirin as a preventive option for oral herpes.
9
Improved immunity
Most Useful Review
Respiratory immunity quercetin has supported me since the epidemic began. I take it a couple of times a week, and daily when the illness is prevalent. It helps in reducing the likelihood of catching cold sores.
Ear Infection details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 3 Reviews
8.5
9
No sinus infections
Most Useful Review
31 people found this helpful
Over 5 years, I battled chronic sinus infections and severe headaches. I began taking quercetin daily with Alkalol nasal wash and steam inhalations. My sinus infection disappeared within weeks, and I haven’t had another in five years. I recommend this regimen for anyone struggling with similar issues.
Irritable Bowel Syndrome details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.5
9
Improved bowel function
Most Useful Review
Excellent product! The ingredients are perfectly chosen, and it does not cause any adverse reactions. The large packaging will last a long time. The capsule size is average, and the taste is neutral. Delivery was rapid and intact. It contains only beneficial and natural ingredients, including folic acid. I've noticed improved bowel function and metabolism within a week, along with a boost in my nervous system's performance and decreased anxiety. The vitamin's effectiveness is indisputable.
Prostate Cancer details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 4 Reviews
8.5
9
Recommended brand
Most Useful Review
17 people found this helpful
My doctor, a leading oncologist, has recommended Jarrow brand as part of my treatment for prostate cancer. He says Jarrow is the brand that most accurately represents what’s on its label.
Blood Clot details
SCIENTIFIC SCORE
Possibly Effective
Based on 16 Researches
7.9
USERS' SCORE
Good
Based on 4 Reviews
8.4
9.5
We explored the effects of quercitrin on platelet activation to better understand its role in blood clotting. Through comprehensive experiments—like assessing platelet aggregation and thrombus formation—we observed that quercitrin significantly hinders platelet activation. This means it impairs platelet aggregation and granule secretion, which are crucial in forming blood clots.
Moreover, quercitrin showed promise in preventing arterial thrombus formation without extending bleeding time, hinting at its potential as a treatment for thrombotic diseases. Overall, our findings suggest that quercitrin could be beneficial in managing blood clot-related conditions.
Moreover, quercitrin showed promise in preventing arterial thrombus formation without extending bleeding time, hinting at its potential as a treatment for thrombotic diseases. Overall, our findings suggest that quercitrin could be beneficial in managing blood clot-related conditions.
9
Improved circulation
Most Useful Review
19 people found this helpful
After taking three tablets, my condition improved significantly, alleviating my hyperlipidaemia and angina pectoris. I experienced headaches and shoulder stiffness, but overall, my circulation feels better. I recommend it, especially for elderly individuals dealing with blood clot risks.
Breast Cancer details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.4
9
Jarrow recommendation
Most Useful Review
17 people found this helpful
My oncologist recommended the Jarrow brand for my breast cancer treatment, stating it accurately reflects what’s on its label.
Bruise details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.4
7.5
Strengthens blood vessels
Most Useful Review
2 people found this helpful
This product effectively clears the blood vessels. I used to get bruises easily from minor ruptures of the small blood capillaries, but now it helps to strengthen them.
Cancer details
SCIENTIFIC SCORE
Moderately Effective
Based on 32 Researches
8.2
USERS' SCORE
Good
Based on 18 Reviews
8.4
9
Quercetin's role against colorectal cancer
We aimed to understand how quercetin and its derivatives, especially mono-methylated quercetins (MQs), might help in treating colorectal cancer. Using advanced techniques like tandem mass spectrometry, we identified specific structural features of these flavonoids that could enhance their anti-cancer activities.
Our findings showed that methylation at specific positions on the quercetin molecule significantly improved its ability to fight cancer cells. Notably, 3-O-methylquercetin and 4'-O-methylquercetin were particularly effective. These compounds caused cancer cells to stop dividing and triggered programmed cell death, also known as apoptosis.
We observed that these MQs worked through several mechanisms, such as inducing oxidative stress, disrupting mitochondrial function, and inactivating cancer-related signaling pathways—all while being non-toxic to normal human colon cells. This makes them promising candidates for cancer therapy, especially for patients with colorectal cancer.
Ultimately, our research revealed that small modifications in flavonoid structures could lead to significant improvements in their anti-cancer effectiveness, providing a path for developing targeted treatments for colorectal cancer.
Our findings showed that methylation at specific positions on the quercetin molecule significantly improved its ability to fight cancer cells. Notably, 3-O-methylquercetin and 4'-O-methylquercetin were particularly effective. These compounds caused cancer cells to stop dividing and triggered programmed cell death, also known as apoptosis.
We observed that these MQs worked through several mechanisms, such as inducing oxidative stress, disrupting mitochondrial function, and inactivating cancer-related signaling pathways—all while being non-toxic to normal human colon cells. This makes them promising candidates for cancer therapy, especially for patients with colorectal cancer.
Ultimately, our research revealed that small modifications in flavonoid structures could lead to significant improvements in their anti-cancer effectiveness, providing a path for developing targeted treatments for colorectal cancer.
9
Cancer resistance
Most Useful Review
56 people found this helpful
Quercetin is a unique and irreplaceable substance that effectively fights against various cancers, including breast and pancreatic cancer. It enhances vascular tone, combats atherosclerosis, allergies, and regulates blood pressure. Additionally, it helps in reducing inflammation and boosts immune response. However, it is vital to know the correct dosage, as excessive intake may be harmful.
Chest Pain details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.4
9
Eases chest pain
Most Useful Review
The 30-pound small bottle is convenient and effective in relieving my chest pain during menstruation. Highly recommend!
Gout details
SCIENTIFIC SCORE
Moderately Effective
Based on 11 Researches
8.1
USERS' SCORE
Good
Based on 3 Reviews
8.4
9
We explored the effects of quercetin, a natural compound, on gout arthritis induced by monosodium urate (MSU) crystals. Our research specifically looked at how quercetin alleviates pain and inflammation associated with gout while examining its interaction with naloxone, a substance known to block opioid receptors.
Mice were treated with quercetin, and we assessed their pain sensitivity from 1 to 24 hours post-MSU injection. Our observations included evaluating the recruitment of white blood cells, levels of inflammatory cytokines, oxidative stress, and activation of certain molecular pathways in the knee joints, all measured at 24 hours after the MSU was introduced.
The results were promising: quercetin effectively reduced MSU-induced pain, inflammation, and related oxidative stress. Notably, the presence of naloxone seemed to negate these benefits, indicating that quercetin's effects are linked to opioid pathways. These findings suggest that quercetin could be a valuable therapeutic option for managing gout symptoms, highlighting its dual role as both an analgesic and anti-inflammatory agent.
Mice were treated with quercetin, and we assessed their pain sensitivity from 1 to 24 hours post-MSU injection. Our observations included evaluating the recruitment of white blood cells, levels of inflammatory cytokines, oxidative stress, and activation of certain molecular pathways in the knee joints, all measured at 24 hours after the MSU was introduced.
The results were promising: quercetin effectively reduced MSU-induced pain, inflammation, and related oxidative stress. Notably, the presence of naloxone seemed to negate these benefits, indicating that quercetin's effects are linked to opioid pathways. These findings suggest that quercetin could be a valuable therapeutic option for managing gout symptoms, highlighting its dual role as both an analgesic and anti-inflammatory agent.
7.5
Effective gout management
Most Useful Review
5 people found this helpful
GOUT Remedy with both Bromelain and Quercetin has worked wonderfully for me over the past five years. My gout remains under control. It's important to remember that food is medicine, so I avoid anything harmful to me, particularly foods that trigger gout.
Heart Disease details
SCIENTIFIC SCORE
Moderately Effective
Based on 16 Researches
8.4
USERS' SCORE
Good
Based on 12 Reviews
8.4
8
We explored how quercetin might help those suffering from heart failure. In our research, we utilized advanced databases to identify specific targets of quercetin, focusing on its effects on heart cells.
Our findings suggest that quercetin may work by reducing cell death in heart cells via the MAPK signaling pathway. Notably, it helped lower a key ratio linked to cell survival and decreased markers of cell stress. Overall, quercetin shows promise in battling heart failure symptoms, but further studies are needed to confirm these effects in broader settings.
Our findings suggest that quercetin may work by reducing cell death in heart cells via the MAPK signaling pathway. Notably, it helped lower a key ratio linked to cell survival and decreased markers of cell stress. Overall, quercetin shows promise in battling heart failure symptoms, but further studies are needed to confirm these effects in broader settings.
9
Heart health improvement
Most Useful Review
5 people found this helpful
Using this has been a huge blessing. I no longer experience skipped heartbeats and believe it may help lower my cholesterol as well.
Hyperthyroidism details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 4 Reviews
8.4
10
Normal index
Most Useful Review
With hyperthyroidism, I maintain a normal index after eating this product.
Bacterial Infection details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 4 Reviews
8.3
7.5
Boosted immune system
Most Useful Review
1 people found this helpful
There are numerous wonderful benefits of Quercetin. It is an excellent antioxidant, may reduce cancer risk, aids in fighting infection, and can help lower high blood pressure. During Covid, my husband and I took the recommended dosage of Quercetin and are convinced it kept our immune systems robust. We will never stop taking Quercetin and highly recommend it.
High Cholesterol details
SCIENTIFIC SCORE
Possibly Effective
Based on 16 Researches
7.8
USERS' SCORE
Good
Based on 3 Reviews
8.3
9
We investigated how onion peel extract, packed with quercetin, affects high cholesterol levels in mice. Divided into four groups, the mice were fed different diets for 12 weeks.
Those receiving the higher dose of onion peel extract showed significant reductions in serum and liver cholesterol levels, along with improved liver health markers compared to the group on a high cholesterol diet alone.
This suggests that quercetin may lower cholesterol by increasing its excretion.
Those receiving the higher dose of onion peel extract showed significant reductions in serum and liver cholesterol levels, along with improved liver health markers compared to the group on a high cholesterol diet alone.
This suggests that quercetin may lower cholesterol by increasing its excretion.
7.5
Reduces cholesterol risk
Most Useful Review
8 people found this helpful
Quercetin is an excellent antioxidant. I took it on my doctor's advice. It protects the brain and heart from damage due to insufficient blood supply, especially with high blood pressure. Quercetin lowers the risk of chronic vascular diseases and helps reduce high cholesterol. My cardiologist recommended it for my mother after her heart attack, and she’s advised to take it twice a year.
Knee Pain details
SCIENTIFIC SCORE
Possibly Effective
Based on 2 Researches
7
USERS' SCORE
Good
Based on 7 Reviews
8.3
7
We conducted a randomized, double-blind study to assess how a glucosamine-containing supplement, which includes quercetin, impacts knee pain. Over 16 weeks, 100 Japanese participants were either given the supplement or a placebo.
While both groups showed some improvement in knee-joint functions, we observed no significant difference overall. However, for individuals with mild-to-severe knee pain, those taking the supplement gained greater knee-extensor strength and improved walking speed by week 16. Thus, quercetin may help enhance movement in selected knee pain cases.
While both groups showed some improvement in knee-joint functions, we observed no significant difference overall. However, for individuals with mild-to-severe knee pain, those taking the supplement gained greater knee-extensor strength and improved walking speed by week 16. Thus, quercetin may help enhance movement in selected knee pain cases.
9
Pain reduction achieved
Most Useful Review
1 people found this helpful
Highly recommend! Quercetin is both an antioxidant and anti-inflammatory. After waking up with knee pain each morning, I tried this product at a friend's suggestion. After about four weeks, the pain subsided, and I'm very pleased with the results!
Liver Disease details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.3
7.5
Reduces disease risk
Most Useful Review
8 people found this helpful
Quercetin is an excellent antioxidant. I had my mother take a course upon her doctor's recommendation. This supplement offers numerous benefits, including protecting the brain and heart against damage from insufficient blood supply, especially with high blood pressure. It's known to reduce the risk of chronic vascular conditions and improve their permeability. After her heart attack, a cardiologist advised my mother to take it twice a year.
Pneumonia details
SCIENTIFIC SCORE
Moderately Effective
Based on 8 Researches
8
USERS' SCORE
Good
Based on 8 Reviews
8.3
8
We investigated quercetin's potential to combat pneumonia and its inflammatory effects triggered by lipopolysaccharide (LPS) using human alveolar epithelial cells. Our findings revealed that quercetin significantly reduced the release of key inflammatory markers and apoptosis in these cells, suggesting it may help manage lung inflammation. By activating the Nrf2 signaling pathway, quercetin not only diminishes inflammation but also protects cells from oxidative stress. Overall, while quercetin shows promise, its effectiveness as a standalone treatment for pneumonia remains unclear.
9
Improve lung function
Most Useful Review
9 people found this helpful
The quality is good; my whole family took it during covid. Our Ukrainian scientists noted quercetin's effectiveness in covid pneumonia and inflammation, improving lung function recovery.
Sleep Apnea details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 6 Reviews
8.3
9
Snoring reduced
Most Useful Review
3 people found this helpful
I consumed it with Momordica charantia. Following consumption, my sleep quality improved, and my snoring diminished significantly. There’s a noticeable difference in how I feel upon waking compared to before.
Whooping Cough details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 7 Reviews
8.3
9
Effective for asthma
Most Useful Review
5 people found this helpful
It helped a lot! Many are familiar with the benefits of quercetin. I purchased it for my mother, who had suffered from allergic asthma for years. After starting quercetin, she stopped using her cough spray entirely, and her cough and seizures have vanished.
Allergies details
SCIENTIFIC SCORE
Moderately Effective
Based on 15 Researches
8.4
USERS' SCORE
Good
Based on 109 Reviews
8.2
9
Quercetin may alleviate allergy symptoms
We conducted a study involving 66 Japanese adults suffering from allergy symptoms, focusing on the potential of a quercetin-containing supplement. Participants took either the supplement or a placebo daily for four weeks.
Notable results showed that those taking quercetin experienced significant improvements in allergy-related symptoms such as eye itching, sneezing, and nasal discharge. Additionally, their overall quality of life received a boost.
While there were minor side effects, the findings suggest that quercetin might be an effective option for managing certain allergy symptoms.
Notable results showed that those taking quercetin experienced significant improvements in allergy-related symptoms such as eye itching, sneezing, and nasal discharge. Additionally, their overall quality of life received a boost.
While there were minor side effects, the findings suggest that quercetin might be an effective option for managing certain allergy symptoms.
10
Life-changing solution
Most Useful Review
140 people found this helpful
It saved me from my chronic allergies in spring and summer. I suffered from allergies until I was 30 years old when I discovered Quercetin. More people should know about this product, as even doctors often prescribe ineffective medications that only temporarily alleviate symptoms.
Arthritis details
SCIENTIFIC SCORE
Moderately Effective
Based on 18 Researches
8.3
USERS' SCORE
Good
Based on 2 Reviews
8.2
9
We explored the effects of quercetin, a natural compound with potential benefits for treating osteoarthritis (OA), specifically focusing on its ability to target damaged chondrocytes, the cartilage cells that play a crucial role in joint health. In our study, we utilized specialized nanoparticles to increase the effectiveness of quercetin, overcoming its usual limitations related to absorption and bioavailability.
Our research involved subjecting human chondrocytes to conditions that mimic OA. Afterward, we treated them with either free quercetin or our quercetin-loaded nanoparticles (Q-NP). We found that the Q-NP not only allowed for better cellular absorption but also selectively induced apoptosis, or programmed cell death, in senescent chondrocytes. This is significant because eliminating these unhealthy cells could pave the way for healthier joint repair and function.
In addition to promoting cell death in the right cells, Q-NP led to an increase in oxidative stress and reduced key markers of cellular aging. We also noted that the treatment halted the cell cycle in cells that needed to be eliminated. Overall, our findings suggest that enhancing quercetin delivery through nanoparticles holds great promise for improving osteoarthritis outcomes by actively removing harmful senescent cells from joint tissues.
Our research involved subjecting human chondrocytes to conditions that mimic OA. Afterward, we treated them with either free quercetin or our quercetin-loaded nanoparticles (Q-NP). We found that the Q-NP not only allowed for better cellular absorption but also selectively induced apoptosis, or programmed cell death, in senescent chondrocytes. This is significant because eliminating these unhealthy cells could pave the way for healthier joint repair and function.
In addition to promoting cell death in the right cells, Q-NP led to an increase in oxidative stress and reduced key markers of cellular aging. We also noted that the treatment halted the cell cycle in cells that needed to be eliminated. Overall, our findings suggest that enhancing quercetin delivery through nanoparticles holds great promise for improving osteoarthritis outcomes by actively removing harmful senescent cells from joint tissues.
7.5
Supports overall health
Most Useful Review
Excellent! Quercetin, known for its antioxidant properties, belongs to a class of water-soluble flavonoids in various fruits and vegetables. It helped my allergies and also supports heart health. Notably, it relieves pain associated with arthritis and other infections.
Autoimmune Disorder details
SCIENTIFIC SCORE
Moderately Effective
Based on 16 Researches
8.1
USERS' SCORE
Good
Based on 11 Reviews
8.2
9
We explored how quercetin, a natural compound, may help alleviate symptoms of systemic lupus erythematosus (SLE), an autoimmune disorder. Our study observed that quercetin reduced kidney damage and swelling in the lymph nodes of lupus-affected mice. It appeared to lower the number of certain T cells that drive the disease and promoted cell death in aged immune cells. By influencing key pathways, quercetin showed potential as a therapy for SLE, offering hope in tackling this complex condition.
9
Symptom relief
Most Useful Review
87 people found this helpful
Close to magic! After struggling with severe adrenal fatigue and an autoimmune disorder, I found Quercetin to be miraculous. During a mastocytosis attack, it outperformed over-the-counter histamine blockers, preventing allergic reactions even with previously offending foods. I recommend it for anyone suffering from allergies, but be cautious with dosage. The quality is impeccable, and I am nearly symptom-free.
Back Pain details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 8 Reviews
8.2
10
Pain relief achieved
Most Useful Review
1 people found this helpful
I highly recommend this product! Quercetin, an antioxidant and anti-inflammatory, has been a game changer for my finger pain. After about four weeks of taking it, the pain subsided significantly. I'm thrilled with the results!
Bone Pain details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 14 Reviews
8.2
7.5
Improves bone health
Most Useful Review
9 people found this helpful
I am ready to sing praises for quercetin. Its anti-inflammatory properties help in treating arthritis, oral ulcers, and periodontal disease, reducing pain from conditions like bone pain and infections. Quercetin serves as an effective antihistamine for allergies and asthma, reduces malignant tumours, and supports cardiovascular health. It combats oxidative stress and boosts immunity, promoting overall well-being.
Flu details
SCIENTIFIC SCORE
Possibly Effective
Based on 1 Research
7
USERS' SCORE
Good
Based on 26 Reviews
8.2
7
V. divergens extract shows promise
We aimed to explore the health benefits of Vochysia divergens, known for its traditional use in treating asthma and flu. The study evaluated how its aqueous leaf extract impacts inflammatory markers in macrophages and lymphocytes.
Through various methods, we discovered that the extract and a specific flavonoid can significantly reduce pro-inflammatory markers. This supports the local tradition of using Cambará tea for respiratory issues, highlighting its potential medicinal properties.
Through various methods, we discovered that the extract and a specific flavonoid can significantly reduce pro-inflammatory markers. This supports the local tradition of using Cambará tea for respiratory issues, highlighting its potential medicinal properties.
9
Allergy relief
Most Useful Review
68 people found this helpful
Help with allergies and venous conditions. Quercetin combined with nettle extract is reported to relieve seasonal allergies when taken a month prior and throughout the allergy season. Many users claim this combination can completely eliminate allergy symptoms or significantly lessen their severity. Quercetin, a plant-based antioxidant, aids in improving the permeability of arteries and veins, helping alleviate spider veins, varicose veins, and other venous issues. It’s a beneficial antioxidant that supports various bodily processes and enhances immunity. Stay healthy!
Heart Attack details
SCIENTIFIC SCORE
Moderately Effective
Based on 16 Researches
8.3
USERS' SCORE
Good
Based on 11 Reviews
8.2
8
We investigated the addition of quercetin to standard treatment in patients experiencing their first heart attack. In this multicenter study with 143 participants, quercetin was administered during the critical early hours of treatment.
The results showed a significant reduction in heart tissue damage compared to those who only received standard therapy. Specifically, fewer patients in the quercetin group experienced internal bleeding in the heart muscle.
While the initial findings are promising, additional studies are needed to confirm these benefits.
The results showed a significant reduction in heart tissue damage compared to those who only received standard therapy. Specifically, fewer patients in the quercetin group experienced internal bleeding in the heart muscle.
While the initial findings are promising, additional studies are needed to confirm these benefits.
9
Allergy relief
Most Useful Review
9 people found this helpful
Every year, I suffer from an allergy attack during Spring. After one day of taking Jarrow Quercetin, I felt better and now enjoy my first Spring in ages. It's like a miracle for me.
Hives details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.2
9
Great for hives
Most Useful Review
This product has been really helpful whenever I consume something that triggers hives.
Influenza details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 4 Reviews
8.2
9
Inhibits virus
Most Useful Review
It possesses anti-inflammatory and antioxidant properties and inhibits the influenza virus.
Rash details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 6 Reviews
8.2
7.5
Effective for allergies
Most Useful Review
37 people found this helpful
Great price for quality. This Quercetin is a good quality flavonoid. I used it for my seasonal pollen allergies, as I often suffer from a persistent rash on my skin and sneezing. No medication had previously helped me. However, Quercetin proved effective, but it's important to take it consistently over time. I now rely on it for my allergies. Highly recommend!
Cardiovascular Disease details
SCIENTIFIC SCORE
Moderately Effective
Based on 14 Researches
8.3
USERS' SCORE
Good
Based on 21 Reviews
8.1
8
We explored the effects of quercetin on cardiac fibrosis, a major concern in cardiovascular diseases. Using an experiment on mice, we administered quercetin after inducing cardiac stress and assessed its impact on heart function and fibrosis. Our findings showed that quercetin significantly reduced cardiac fibrosis and helped reverse cell proliferation caused by stress hormones. This protective effect was linked to its regulation of the SIRT3 signaling pathway. Overall, quercetin presents a promising avenue for addressing heart fibrosis.
9
Reduces allergy symptoms
Most Useful Review
2 people found this helpful
An excellent antioxidant, quercetin strengthens capillaries and supports cardiovascular health. I buy it for my mother to alleviate allergy symptoms, as it blocks histamine production effectively.
Cold details
SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8.3
USERS' SCORE
Good
Based on 56 Reviews
8.1
8
We observed that quercetin, a powerful antioxidant, plays a significant role in helping grapes withstand cold temperatures. In our study, we found that grapes exposed to low temperatures accumulate more quercetin, which in turn enhances their cold resistance.
By applying exogenous quercetin, we noted a marked improvement in the grapes' ability to endure low-temperature stress. Our research revealed that a key gene, VvFLS1, responsible for quercetin synthesis is upregulated when grapes experience cold conditions.
We also discovered that VvbZIP22, a protein that binds to the VvFLS1 promoter, is crucial for mediating this process. When we overexpressed VvbZIP22 in grapes, it resulted in higher levels of quercetin and improved cold resistance, further confirming its pivotal role in the plant's adaptation to harsh environments.
Through these findings, we highlighted the importance of quercetin in enhancing grape survival during cold spells, showcasing a vital link between plant biology and climate resilience.
By applying exogenous quercetin, we noted a marked improvement in the grapes' ability to endure low-temperature stress. Our research revealed that a key gene, VvFLS1, responsible for quercetin synthesis is upregulated when grapes experience cold conditions.
We also discovered that VvbZIP22, a protein that binds to the VvFLS1 promoter, is crucial for mediating this process. When we overexpressed VvbZIP22 in grapes, it resulted in higher levels of quercetin and improved cold resistance, further confirming its pivotal role in the plant's adaptation to harsh environments.
Through these findings, we highlighted the importance of quercetin in enhancing grape survival during cold spells, showcasing a vital link between plant biology and climate resilience.
9
Breathing better.
Most Useful Review
20 people found this helpful
WHERE HAVE YOU BEEN ALL MY LIFE? I have suffered from perennial rhinitis for as long as I can remember. Always sniffling and feeling blocked, leading to trouble breathing during activities. After struggling with bronchitis from post-nasal drip, and having been advised by my ENT doctor about swollen turbinates, I began taking this product. I’ve only had it for three days, one pill in the morning, and my turbinates have returned to normal size. My breathing is now completely unobstructed. This product is wonderful and appears more effective than similar options!
Common Cold details
SCIENTIFIC SCORE
Possibly Effective
Based on 7 Researches
7.6
USERS' SCORE
Good
Based on 24 Reviews
8.1
9
We investigated whether quercetin, a natural plant compound, could help combat common cold caused by rhinovirus (RV). In our study, quercetin reduced RV replication and inflammation in airway cells both in laboratory settings and in mice. When given before or after infection, quercetin limited the virus's ability to replicate and decreased harmful immune responses.
While our findings are promising, indicating that quercetin acts at various points in the virus's lifecycle, we recognize the need for further research to solidify its effectiveness in treating or preventing common colds.
While our findings are promising, indicating that quercetin acts at various points in the virus's lifecycle, we recognize the need for further research to solidify its effectiveness in treating or preventing common colds.
9
Strong immunity
Most Useful Review
16 people found this helpful
Jarrow Formulas Quercetin has been a part of my daily routine for over four years, at 1000 mg. As a lupus patient with a weakened immune system, I rarely catch the common cold, which is significantly better than before. I attribute my improved health largely to quercetin.
Lung Cancer details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.1
9
Recommended brand
Most Useful Review
17 people found this helpful
My doctor, a leading oncologist, recommended the Jarrow brand for my treatment for prostate cancer. He stated it is the brand that most accurately reflects its label.
Swollen Lymph Nodes details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 5 Reviews
8.1
9
Relieves swelling
Most Useful Review
Quercetin is effective when combined with adenoids; it significantly alleviates swelling.
Pelvic Pain details
SCIENTIFIC SCORE
Possibly Effective
Based on 15 Researches
7.8
USERS' SCORE
Good
Based on 13 Reviews
8
9
We recently tested a quercetin-based supplement, Cysta-Q, on 22 patients with interstitial cystitis (IC) in an open-label trial. Over 4 weeks, participants took two capsules daily, and we assessed their symptoms before and after treatment.
The results were encouraging; all patients reported improvements in their problem and symptom indices, as well as pain levels. Interestingly, everyone but one individual experienced some positive change, and there were no side effects reported.
These promising findings suggest that quercetin could be beneficial for those suffering from IC, although larger, controlled studies are needed for confirmation.
The results were encouraging; all patients reported improvements in their problem and symptom indices, as well as pain levels. Interestingly, everyone but one individual experienced some positive change, and there were no side effects reported.
These promising findings suggest that quercetin could be beneficial for those suffering from IC, although larger, controlled studies are needed for confirmation.
9
Pain management improvement
Most Useful Review
4 people found this helpful
This product has been wonderful for my Interstitial Cystitis. I cannot live without it; when I run out, my pain returns. This supplement effectively manages both pain and the frequency of urination. I take 1,000 mg daily and find it a great product!
Dizziness details
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Moderately Good
Based on 3 Reviews
7.9
8
Our exploration focused on the effectiveness of a treatment called ascovertin in patients suffering from stages I and II of vascular encephalopathy, often linked to atherosclerosis. This treatment, comprised of flavonoid dihydroquercetin and ascorbic acid, was administered over a period of 21 days to a group of 21 patients.
In contrast, we had a comparison group of 10 patients who did not receive ascovertin. The results were promising, revealing that those who took ascovertin experienced significant relief from headaches, decreased vertigo, and less overall fatigue. Furthermore, cognitive functions showed noticeable improvement.
Alongside these benefits, we noted a reliable reduction in whole blood viscosity, suggesting better blood flow and health of blood cells. Specifically, ascovertin appeared to enhance cellular rheology, which means our study participants demonstrated improved flexibility of red blood cells, reduced clumping, and lower levels of harmful lipid peroxidation in both their red blood cells and blood plasma.
However, it’s important to mention that because quercetin was part of a combination treatment, isolating its specific effect on dizziness is challenging. Thus, while benefits were observed, the distinct role of quercetin is not definitively determined in this context.
In contrast, we had a comparison group of 10 patients who did not receive ascovertin. The results were promising, revealing that those who took ascovertin experienced significant relief from headaches, decreased vertigo, and less overall fatigue. Furthermore, cognitive functions showed noticeable improvement.
Alongside these benefits, we noted a reliable reduction in whole blood viscosity, suggesting better blood flow and health of blood cells. Specifically, ascovertin appeared to enhance cellular rheology, which means our study participants demonstrated improved flexibility of red blood cells, reduced clumping, and lower levels of harmful lipid peroxidation in both their red blood cells and blood plasma.
However, it’s important to mention that because quercetin was part of a combination treatment, isolating its specific effect on dizziness is challenging. Thus, while benefits were observed, the distinct role of quercetin is not definitively determined in this context.
9
Significant improvement
Most Useful Review
My headaches and dizziness have improved significantly!
Sinusitis details
SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8
USERS' SCORE
Moderately Good
Based on 7 Reviews
7.8
9
Quercetin reduces sinus inflammation
This study explored how quercetin may help reduce inflammation associated with sinusitis using a rat model. We observed that introducing lipopolysaccharides (LPS) caused significant inflammation in nasal and sinus areas, as well as in the lungs and brain.
When we administered quercetin after the LPS treatment, it notably decreased inflammatory markers like TNF-α and IL-6. The results indicated reduced inflammation in nasal and lung tissues, showcasing quercetin's potential benefits. However, while there were encouraging findings, its effects on brain inflammation were more limited.
When we administered quercetin after the LPS treatment, it notably decreased inflammatory markers like TNF-α and IL-6. The results indicated reduced inflammation in nasal and lung tissues, showcasing quercetin's potential benefits. However, while there were encouraging findings, its effects on brain inflammation were more limited.
10
Fantastic results
Most Useful Review
19 people found this helpful
I adore this supplement. I have suffered from chronic sinusitis year-round, and my body started rejecting over-the-counter medications like Zyrtec and Claritin. After researching, I found this supplement with Bromelain. I take four a day, two in the morning and two in the evening, and it works wonders! My nose is unblocked, no sneezing or runny nose, and it eases the pain of congestion in my head, neck, and shoulders, leaving me relaxed.
Eczema details
SCIENTIFIC SCORE
Possibly Effective
Based on 3 Researches
7.7
USERS' SCORE
Moderately Good
Based on 15 Reviews
7.7
8
We investigated the potential of quercetin, a natural compound known for its antioxidant properties, in treating cutaneous eczema. Specifically, we prepared a special formulation of quercetin contained within liposomes and mixed it into a gel. This method aimed to enhance the compound's effectiveness in promoting skin healing.
Our findings revealed that this quercetin-infused gel not only demonstrated significant antioxidant activity but also improved skin conditions in mice suffering from eczema. The application of this formulation led to noteworthy reductions in various symptoms associated with the skin condition, such as inflammation and epidermal peeling.
In comparison to a commonly used eczema treatment, we found that the quercetin formulation outperformed the commercially available steroid cream in reducing malondialdehyde levels, a marker of oxidative stress in the body. These results suggest that quercetin-containing liposomes hold promise as a novel approach for preventing and treating cutaneous eczema.
Our findings revealed that this quercetin-infused gel not only demonstrated significant antioxidant activity but also improved skin conditions in mice suffering from eczema. The application of this formulation led to noteworthy reductions in various symptoms associated with the skin condition, such as inflammation and epidermal peeling.
In comparison to a commonly used eczema treatment, we found that the quercetin formulation outperformed the commercially available steroid cream in reducing malondialdehyde levels, a marker of oxidative stress in the body. These results suggest that quercetin-containing liposomes hold promise as a novel approach for preventing and treating cutaneous eczema.
7.5
Helpful for eczema
Most Useful Review
15 people found this helpful
I think it helped with my eczema. I had a difficult time with my skin, and my eczema began to clear up around the time I started using this product. Since the capsule is too large for me to swallow, I mix it in my yogurt in the morning, which works well.
Headache details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Medium or Average
Based on 7 Reviews
6.4
9
Sinus headache relief
Most Useful Review
4 people found this helpful
Love this stuff!. This makes me feel so much better! My sinus headaches vanish completely when I take these.
