Last update
6/9/2026
Reviewed By
Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 19 Researches
8.4
USERS' SCORE
Good
Based on 18 Reviews
8.6
Supplement Facts
Serving Size: 2 Veg Capsules
Amount Per Serving
%DV
Quercetin
800 mg
**
Bromelain (2,400 GDU/g)
165 mg
**
Top Medical Research Studies
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.
Read More
8
We explored how quercetin may help alleviate allergies by examining its impact on certain immune cells involved in allergic reactions. Using different types of mast cells, we observed that quercetin triggered the production of heme oxygenase-1 (HO-1), which plays a key role in this process.
Interestingly, when we inhibited HO-1, the protective effects of quercetin vanished, suggesting that the Nrf2-HO-1 pathway is crucial for its anti-allergic actions. Our findings strongly indicate that quercetin could be valuable in managing allergic responses.
Interestingly, when we inhibited HO-1, the protective effects of quercetin vanished, suggesting that the Nrf2-HO-1 pathway is crucial for its anti-allergic actions. Our findings strongly indicate that quercetin could be valuable in managing allergic responses.
Read More
9.5
We delved into the effects of quercetin on peanut-induced anaphylactic reactions using a rat model. The study involved sensitized Wistar rats divided into treatment and control groups. After four weeks of quercetin treatment, we observed a significant decrease in plasma histamine levels and anaphylactic responses.
Our results suggest that quercetin effectively mitigates reactions related to peanut allergies, highlighting its potential as an alternative medicine for these food sensitivities. This presents an exciting avenue for those seeking solutions beyond traditional palliative care.
Our results suggest that quercetin effectively mitigates reactions related to peanut allergies, highlighting its potential as an alternative medicine for these food sensitivities. This presents an exciting avenue for those seeking solutions beyond traditional palliative care.
Read More
Most Useful Reviews
10
Effective for allergies
37 people found this helpful
Life changing. This is the best product I've found in years for seasonal allergies. A friend suggested this product, and I was sceptical. It requires four pills a day, which seems excessive. However, this has been the best year for my allergies. For the first time in seven years, my allergies didn't progress to bronchitis or pneumonia. I wish I had known about this sooner and recommend it to everyone. Doctors should promote this instead of ineffective allergy treatments. I've bought multiple bottles and will continue to do so.
Read More
9
Life-changing product
15 people found this helpful
Life-changing. I take quercetin for allergies, and I can hardly believe how well it works. I discovered this product through a recommendation. I had been struggling with numerous allergies, including hives that the sun activated and severe hay fever. After using this product for two years, I have taken only a few Benedryl, compared to before when it was my only relief. Now, I can enjoy outdoor activities without experiencing allergies or side effects.
Read More
9
Effective hay fever control
14 people found this helpful
Natural hay fever control - no drowsiness! I've been using this for years to manage my hay fever allergies. I appreciate that it's not necessary to take it every day, just when symptoms arise. While I am not a professional, it appears to work by balancing my immune system against allergens. I take one or two capsules when pollen levels are high and can remain symptom-free for weeks or even months.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 19 Researches
8.4
- All Researches
9.5
We delved into the effects of quercetin on peanut-induced anaphylactic reactions using a rat model. The study involved sensitized Wistar rats divided into treatment and control groups. After four weeks of quercetin treatment, we observed a significant decrease in plasma histamine levels and anaphylactic responses.
Our results suggest that quercetin effectively mitigates reactions related to peanut allergies, highlighting its potential as an alternative medicine for these food sensitivities. This presents an exciting avenue for those seeking solutions beyond traditional palliative care.
Our results suggest that quercetin effectively mitigates reactions related to peanut allergies, highlighting its potential as an alternative medicine for these food sensitivities. This presents an exciting avenue for those seeking solutions beyond traditional palliative care.
Read More
9.5
The study looked into how plant-made influenza vaccines interact with the immune system, particularly concerning allergies. We followed 280 participants over six months, monitoring for allergic reactions and measuring specific antibodies.
While some subjects produced temporary IgG and occasionally IgE antibodies, no allergic symptoms were reported. Importantly, the study found these antibody responses were not tied to allergy worsening, indicating that these vaccines may be safe for those with known plant allergies.
While some subjects produced temporary IgG and occasionally IgE antibodies, no allergic symptoms were reported. Importantly, the study found these antibody responses were not tied to allergy worsening, indicating that these vaccines may be safe for those with known plant allergies.
Read More
9
Quercetin shows promise in allergies
We delved into the potential of quercetin as a therapeutic option for treating allergic rhinitis, a common condition affecting roughly 40% of the global population. This study utilized various in-silico approaches, such as network pharmacology and molecular docking, to identify compounds from traditional medicinal plants and assess their effectiveness.
Among the 241 compounds analyzed, quercetin stood out due to its strong binding affinities with important targets linked to inflammatory and immune pathways. Our assessments indicated that quercetin could interact effectively with key cytokines involved in allergic reactions, potentially reducing allergy symptoms.
While the study highlighted promising implications for quercetin, it did not isolate its effects from other examined compounds. Therefore, further experimental testing is needed to affirm its benefits and effectiveness in real-world allergy treatment situations.
Among the 241 compounds analyzed, quercetin stood out due to its strong binding affinities with important targets linked to inflammatory and immune pathways. Our assessments indicated that quercetin could interact effectively with key cytokines involved in allergic reactions, potentially reducing allergy symptoms.
While the study highlighted promising implications for quercetin, it did not isolate its effects from other examined compounds. Therefore, further experimental testing is needed to affirm its benefits and effectiveness in real-world allergy treatment situations.
Read More
9
We investigated how a specific leaf extract affects allergic inflammation in immune cell lines.
Our study revealed that this extract notably reduced the release of allergy-related chemicals like histamine. It also decreased inflammatory responses by limiting the activity of certain enzymes involved in inflammation.
The findings suggest that the active compounds in the extract, specifically quercetin and kaempferol, could offer therapeutic benefits in managing allergies.
Our study revealed that this extract notably reduced the release of allergy-related chemicals like histamine. It also decreased inflammatory responses by limiting the activity of certain enzymes involved in inflammation.
The findings suggest that the active compounds in the extract, specifically quercetin and kaempferol, could offer therapeutic benefits in managing allergies.
Read More
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.
Read More
User Reviews
USERS' SCORE
Good
Based on 18 Reviews
8.6
- All Reviews
- Positive Reviews
- Negative Reviews
10
Effective for allergies
37 people found this helpful
Life changing. This is the best product I've found in years for seasonal allergies. A friend suggested this product, and I was sceptical. It requires four pills a day, which seems excessive. However, this has been the best year for my allergies. For the first time in seven years, my allergies didn't progress to bronchitis or pneumonia. I wish I had known about this sooner and recommend it to everyone. Doctors should promote this instead of ineffective allergy treatments. I've bought multiple bottles and will continue to do so.
Read More
9
Life-changing product
15 people found this helpful
Life-changing. I take quercetin for allergies, and I can hardly believe how well it works. I discovered this product through a recommendation. I had been struggling with numerous allergies, including hives that the sun activated and severe hay fever. After using this product for two years, I have taken only a few Benedryl, compared to before when it was my only relief. Now, I can enjoy outdoor activities without experiencing allergies or side effects.
Read More
9
Effective hay fever control
14 people found this helpful
Natural hay fever control - no drowsiness! I've been using this for years to manage my hay fever allergies. I appreciate that it's not necessary to take it every day, just when symptoms arise. While I am not a professional, it appears to work by balancing my immune system against allergens. I take one or two capsules when pollen levels are high and can remain symptom-free for weeks or even months.
Read More
9
Improved allergy symptoms
10 people found this helpful
Great supplement for allergies. I use these alongside my prescription allergy meds (Claritin D). I notice immediately when I miss a dose. This product is effective against multiple allergy symptoms (itchy throat, runny nose). It's the best value for money, and I consistently recommend it to those with severe seasonal allergies like mine.
Read More
10
Asthma management
9 people found this helpful
Amazing product, highly recommend it. I purchased this for my daughter, who has faced numerous emergency room visits due to severe asthma. After two months of using this supplement, she's off all medications and is even exercising. This is essential for allergies, asthma, and autoimmune issues. I will continue to buy this product without hesitation.
Read More
Frequently Asked Questions
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.
9
Quercetin shows promise in allergies
We delved into the potential of quercetin as a therapeutic option for treating allergic rhinitis, a common condition affecting roughly 40% of the global population. This study utilized various in-silico approaches, such as network pharmacology and molecular docking, to identify compounds from traditional medicinal plants and assess their effectiveness.
Among the 241 compounds analyzed, quercetin stood out due to its strong binding affinities with important targets linked to inflammatory and immune pathways. Our assessments indicated that quercetin could interact effectively with key cytokines involved in allergic reactions, potentially reducing allergy symptoms.
While the study highlighted promising implications for quercetin, it did not isolate its effects from other examined compounds. Therefore, further experimental testing is needed to affirm its benefits and effectiveness in real-world allergy treatment situations.
Among the 241 compounds analyzed, quercetin stood out due to its strong binding affinities with important targets linked to inflammatory and immune pathways. Our assessments indicated that quercetin could interact effectively with key cytokines involved in allergic reactions, potentially reducing allergy symptoms.
While the study highlighted promising implications for quercetin, it did not isolate its effects from other examined compounds. Therefore, further experimental testing is needed to affirm its benefits and effectiveness in real-world allergy treatment situations.
7
We investigated how quercetin works alongside fucoidan to help manage allergies, particularly type I hypersensitivity like hay fever. Our findings showed that when quercetin was taken together with fucoidan, even lower amounts could still provide significant anti-allergic effects.
Interestingly, taking just 50 μg of quercetin in combination with fucoidan produced similar benefits as higher doses alone. This suggests that the combination of these ingredients could lessen the need for larger fucoidan servings while still being effective.
It seems we’ve found a promising food combination that enhances allergy relief!
Interestingly, taking just 50 μg of quercetin in combination with fucoidan produced similar benefits as higher doses alone. This suggests that the combination of these ingredients could lessen the need for larger fucoidan servings while still being effective.
It seems we’ve found a promising food combination that enhances allergy relief!
7
Quercetin shows potential for allergies
We explored the potential benefits of quercetin and other dietary components in managing allergic reactions. Research indicates that quercetin may play a role in reducing symptoms of allergic rhinitis by suppressing inflammatory mediators from mast cells, essential players in allergic responses.
Our analysis highlighted that while quercetin shows promise, it’s one of several dietary factors needing further investigation, especially due to concerns about how well our bodies can use these nutrients. Continued research on improving their bioavailability is crucial for maximizing their effects on allergies.
Our analysis highlighted that while quercetin shows promise, it’s one of several dietary factors needing further investigation, especially due to concerns about how well our bodies can use these nutrients. Continued research on improving their bioavailability is crucial for maximizing their effects on allergies.
References
- Islam KMT, Mahmud S. In-silico exploring pathway and mechanism-based therapeutics for allergic rhinitis: Network pharmacology, molecular docking, ADMET, quantum chemistry and machine learning based QSAR approaches. Comput Biol Med. 2025;187:109754. 10.1016/j.compbiomed.2025.109754
- Bunddulam P, Nakamura M, Zorig A, Hinata Y, Takasugi M, et al. Effects of Leaf Extract on Allergic Inflammation in Immune Cell Lines. Prev Nutr Food Sci. 2025;30:68. 10.3746/pnf.2025.30.1.68
- Kaag S, Lorentz A. Effects of Dietary Components on Mast Cells: Possible Use as Nutraceuticals for Allergies?. Cells. 2023;12. 10.3390/cells12222602
- Mizuno M, Fujioka A, Bitani S, Minato KI, Sakakibara H. Anti-Allergic Activity of Fucoidan Can Be Enhanced by Coexistence with Quercetin. Int J Mol Sci. 2022;23. 10.3390/ijms232012163
- Yamada S, Shirai M, Inaba Y, Takara T. Effects of repeated oral intake of a quercetin-containing supplement on allergic reaction: a randomized, placebo-controlled, double-blind parallel-group study. Eur Rev Med Pharmacol Sci. 2022;26:4331. 10.26355/eurrev_202206_29072
- Afify SM, Pali-Schöll I, Hufnagl K, Hofstetter G, El-Bassuoni MA, et al. Bovine Holo-Beta-Lactoglobulin Cross-Protects Against Pollen Allergies in an Innate Manner in BALB/c Mice: Potential Model for the Farm Effect. Front Immunol. 2021;12:611474. 10.3389/fimmu.2021.611474
- Ding Y, Che D, Li C, Cao J, Wang J, et al. Quercetin inhibits Mrgprx2-induced pseudo-allergic reaction via PLCγ-IP3R related Ca fluctuations. Int Immunopharmacol. 2019;66:185. 10.1016/j.intimp.2018.11.025
- Carbone ML, Lulli D, Passarelli F, Pastore S. Topical Plant Polyphenols Prevent Type I Interferon Signaling in the Skin and Suppress Contact Hypersensitivity. Int J Mol Sci. 2018;19. 10.3390/ijms19092652
- Takasugi M, Muta E, Yamada K, Arai H. A new method to evaluate anti-allergic effect of food component by measuring leukotriene B from a mouse mast cell line. Cytotechnology. 2018;70:177. 10.1007/s10616-017-0129-9
- Kim M, Lim SJ, Kang SW, Um BH, Nho CW. Aceriphyllum rossii extract and its active compounds, quercetin and kaempferol inhibit IgE-mediated mast cell activation and passive cutaneous anaphylaxis. J Agric Food Chem. 2014;62:3750. 10.1021/jf405486c
- Shishehbor F, Behroo L, Ghafouriyan Broujerdnia M, Namjoyan F, Latifi SM. Quercetin effectively quells peanut-induced anaphylactic reactions in the peanut sensitized rats. Iran J Allergy Asthma Immunol. 2010;9:27. PubMed
- Matsushima M, Takagi K, Ogawa M, Hirose E, Ota Y, et al. Heme oxygenase-1 mediates the anti-allergic actions of quercetin in rodent mast cells. Inflamm Res. 2009;58:705. 10.1007/s00011-009-0039-1
- Cruz EA, Da-Silva SA, Muzitano MF, Silva PM, Costa SS, et al. Immunomodulatory pretreatment with Kalanchoe pinnata extract and its quercitrin flavonoid effectively protects mice against fatal anaphylactic shock. Int Immunopharmacol. 2008;8:1616. 10.1016/j.intimp.2008.07.006
- Shaik YB, Castellani ML, Perrella A, Conti F, Salini V, et al. Role of quercetin (a natural herbal compound) in allergy and inflammation. J Biol Regul Homeost Agents. 2006;20:47. PubMed
- Rogerio AP, Kanashiro A, Fontanari C, da Silva EV, Lucisano-Valim YM, et al. Anti-inflammatory activity of quercetin and isoquercitrin in experimental murine allergic asthma. Inflamm Res. 2007;56:402. PubMed
- Abram DM, Fernandes LGR, Perez-Riverol A, Regina Brochetto-Braga M, Zollner RL. Cross-Reactive Carbohydrate Determinant in , and Venoms: Identification of Allergic Sensitization and Cross-Reactivity. Toxins (Basel). 2020;12. 10.3390/toxins12100649
- Ward BJ, Landry N, Trépanier S, Mercier G, Dargis M, et al. Human antibody response to N-glycans present on plant-made influenza virus-like particle (VLP) vaccines. Vaccine. 2014;32:6098. 10.1016/j.vaccine.2014.08.079
- Secor ER, Carson WF, Cloutier MM, Guernsey LA, Schramm CM, et al. Bromelain exerts anti-inflammatory effects in an ovalbumin-induced murine model of allergic airway disease. Cell Immunol. 2005;237:68. PubMed
- Braun JM, Schneider B, Beuth HJ. Therapeutic use, efficiency and safety of the proteolytic pineapple enzyme Bromelain-POS in children with acute sinusitis in Germany. In Vivo. 2005;19:417. PubMed
