Overview

SCIENTIFIC SCORE
Moderately Effective
Based on 16 Researches
8.4
USERS' SCORE
Good
Based on 36 Reviews
8
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

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.
Read More
9
Quercetin shows promise for heart recovery
We investigated how quercetin, a natural compound found in fruits and vegetables, could help prevent damage after a heart attack (myocardial infarction). Our study used adult male mice to analyze the effects of two weeks of quercetin treatment before simulating a heart attack.

The results were encouraging: quercetin improved heart function, enhanced survival rates, and minimized heart damage. Additionally, it appeared to reduce inflammation and increase protective immune responses in the heart. Overall, quercetin shows potential as a helpful player in heart disease recovery.
Read More
We aimed to understand how quercetin, a natural flavonoid, might help protect against heart issues linked to hormonal changes in postmenopausal conditions. In our study, ovariectomized female rats received either quercetin treatment or a control substance for four weeks.

We found that quercetin significantly reduced heart damage and the risk of abnormal heart rhythms after restoration of blood flow. Additionally, it seemed to support healthier mitochondrial function. Our findings suggest that quercetin could be beneficial in managing heart health during menopause.
Read More

Most Useful Reviews

9.5
Natural antihistamine
Having suffered from allergies and asthma for years, I turned to natural solutions like quercetin. This supplement reduces my allergic reactions and systemic inflammation, helping mitigate symptoms associated with heart disease.
Read More
9.5
Temperature normalised
Quercetin remarkably helped me return my unexplained fever to normal, which persisted for a year despite concerns about my heart disease. I initially began it upon my doctor’s suggestion and found it effective after switching to a higher dose.
Read More
9.5
Chemotherapy support
Since September 2020, I've been using quercetin while preparing for surgery due to my varicose veins. After undergoing chemotherapy, I believe this supplement has helped with inflammation and provided support regarding my heart disease risk.
Read More

Medical Researches

SCIENTIFIC SCORE
Moderately Effective
Based on 16 Researches
8.4
  • All Researches
9
Quercetin shows promise for heart recovery
We investigated how quercetin, a natural compound found in fruits and vegetables, could help prevent damage after a heart attack (myocardial infarction). Our study used adult male mice to analyze the effects of two weeks of quercetin treatment before simulating a heart attack.

The results were encouraging: quercetin improved heart function, enhanced survival rates, and minimized heart damage. Additionally, it appeared to reduce inflammation and increase protective immune responses in the heart. Overall, quercetin shows potential as a helpful player in heart disease recovery.
Read More
We aimed to understand how quercetin, a natural flavonoid, might help protect against heart issues linked to hormonal changes in postmenopausal conditions. In our study, ovariectomized female rats received either quercetin treatment or a control substance for four weeks.

We found that quercetin significantly reduced heart damage and the risk of abnormal heart rhythms after restoration of blood flow. Additionally, it seemed to support healthier mitochondrial function. Our findings suggest that quercetin could be beneficial in managing heart health during menopause.
Read More
We explored how senolytics, specifically dasatinib and quercetin, can rejuvenate aging heart muscle cells. By modeling doxorubicin-induced cardiomyopathy in human cardiac organoids, we treated these aged cells with the senolytics after they exhibited age-related damage.

Our findings showed that this treatment reduced oxidative stress and cellular damage, improving cell function and structure. Overall, senolytics were effective in restoring the viability and regenerative capabilities of these heart cells, highlighting their potential for treating age-related heart conditions.
Read More
We explored whether quercetin could help reduce heart damage following a heart attack. In our study, Wistar rats underwent a procedure simulating a heart attack and received quercetin before the reperfusion phase. The results were encouraging—quercetin treatment improved heart function and reduced the formation of harmful substances called NETs. This suggests that quercetin may be a valuable tool for protecting the heart during recovery from cardiac events. However, our findings mainly apply to animal models and require further research in humans for validation.
Read More
9
DBD components help coronary dilation
We explored how Danggui Buxue Decoction (DBD) and its ingredients, such as quercetin, influence coronary artery dilation. By examining pre-constricted coronary arteries in a lab setting with rats, we found that the active components of DBD effectively activated potassium channels, leading to increased blood flow in the coronary arteries.

While DBD shows promise for treating conditions like coronary heart disease, more research is needed to fully understand the mechanisms behind its effects. Overall, our findings suggest it could be a beneficial therapy for those suffering from vascular issues.
Read More

User Reviews

USERS' SCORE
Good
Based on 36 Reviews
8
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9.5
Natural antihistamine
Having suffered from allergies and asthma for years, I turned to natural solutions like quercetin. This supplement reduces my allergic reactions and systemic inflammation, helping mitigate symptoms associated with heart disease.
Read More
9.5
Temperature normalised
Quercetin remarkably helped me return my unexplained fever to normal, which persisted for a year despite concerns about my heart disease. I initially began it upon my doctor’s suggestion and found it effective after switching to a higher dose.
Read More
9.5
Chemotherapy support
Since September 2020, I've been using quercetin while preparing for surgery due to my varicose veins. After undergoing chemotherapy, I believe this supplement has helped with inflammation and provided support regarding my heart disease risk.
Read More
9.5
Anti-inflammatory benefits
Many overlook the benefits of quercetin, which acts as a natural anti-inflammatory and antihistamine. I've found it useful in alleviating allergy symptoms and inflammation, proving beneficial in my fight against heart disease.
Read More
9.5
Blood pressure improvement
This is not my first time using it. My parents take it to maintain their heart and blood vessels. Combined with Q10 and Omega 3, it has shown excellent results, particularly in lowering my dad's blood pressure.
Read More

Frequently Asked Questions

Heart disease refers to a range of conditions that affect the heart's function and overall health. This umbrella term includes various cardiovascular issues such as coronary artery disease, which is caused by the buildup of plaque in the arteries; heart rhythm problems (arrhythmias); and heart defects present at birth (congenital heart defects). Additionally, heart disease encompasses conditions related to the heart muscle, such as cardiomyopathy, and the heart's valves, which might not open or close properly. The effects of heart disease can be significant, impacting not only physical health but also quality of life, making prevention and timely medical intervention crucial.

Several risk factors contribute to the development of heart disease, including high blood pressure, high cholesterol levels, diabetes, obesity, poor diet, physical inactivity, and smoking. Genetics also play a role, as heart disease can run in families. To mitigate the risks, healthcare professionals typically recommend lifestyle changes such as adopting a heart-healthy diet, engaging in regular physical activity, and avoiding tobacco use. For those already diagnosed with heart disease, treatment options can vary widely, ranging from lifestyle modifications to medications and, in severe cases, surgical interventions. Understanding the nature of heart disease and its risk factors is an essential step toward prevention and effective management.

Quercetin is a naturally occurring flavonoid that is found in a variety of fruits, vegetables, and grains. Known for its antioxidant properties, quercetin is believed to help combat oxidative stress in the body, which can contribute to various health issues. You can commonly find it in foods such as apples, onions, berries, and citrus fruits, as well as in leafy greens. This makes it a popular dietary supplement among health enthusiasts looking to enhance their overall wellness.

Beyond its antioxidant capacity, quercetin is also being researched for its potential anti-inflammatory effects and benefits for immune support. Some studies suggest that it may help reduce allergy symptoms and improve exercise performance by decreasing muscle fatigue. With its wide range of potential health benefits, quercetin is often marketed as a natural remedy for various ailments, although it’s essential to consult a healthcare professional before starting any new supplement regimen to ensure its safety and effectiveness for your specific needs.

Quercetin, a flavonoid found in many fruits, vegetables, and grains, has gained attention for its potential cardiovascular benefits. Studies suggest that quercetin may help improve heart health by reducing blood pressure, lowering LDL cholesterol levels, and exerting anti-inflammatory effects, which can all contribute to a healthier cardiovascular system. The antioxidant properties of quercetin may also protect blood vessels from damage, potentially reducing the risk of heart disease.

However, while the preliminary evidence is promising, more extensive clinical trials are needed to establish definitive conclusions regarding its efficacy in preventing or treating heart disease. It's essential to consider that quercetin supplements may interact with certain medications, so consulting with a healthcare professional before adding them to your regimen is advisable. A balanced diet rich in whole foods that naturally contain quercetin, such as apples, onions, and berries, remains one of the best approaches to support heart health.

Based on user reviews, the timeline for seeing results from quercetin when taking it for heart disease can vary significantly. Many users report experiencing positive changes within a week of starting the supplement. For instance, one reviewer noted noticeable improvements in their allergies and digestion after just a week of taking 500 mg of quercetin (Read Review). Another user indicated that they found it effective after adjusting to a higher dose, implying a short initial adjustment period (Read Review).

However, results can also depend on individual health conditions and dosages. Some users suggest a more extended period for optimal benefits, particularly for those needing to manage specific health concerns linked to heart disease. For example, using quercetin post-surgery or in conjunction with other supplements has been noted to enhance overall effectiveness in reducing inflammation and supporting cardiovascular health (Read Review). Thus, while initial effects may be seen rapidly, sustained use may be necessary for comprehensive benefits.

Quercetin, a natural flavonoid found in various fruits and vegetables, has garnered attention in recent studies for its potential benefits in heart health. Research indicates that quercetin may improve heart function and minimize damage following myocardial infarctions. In a study using mice, quercetin treatment not only enhanced survival rates but also reduced inflammation and increased protective immune responses in the heart (see [1]). Additional findings suggest quercetin could play a significant role in managing heart conditions linked to age and hormonal changes, particularly in studies involving postmenopausal rats ([3]) and sepsis-induced heart injury models ([11]).

Moreover, quercetin’s antioxidant and anti-inflammatory properties have shown promise in several cardiac studies, including those examining its effects on heart damage due to medical treatments like doxorubicin ([2]) and exposure to toxins ([8]). Overall, while the evidence supporting quercetin's potential in heart disease is compelling, it's worth noting that many of these studies have been conducted in animal models. Therefore, further research, particularly in human populations, is essential to validate these findings and better understand quercetin's therapeutic applications in heart disease.

Based on user reviews, many individuals have reported positive improvements in their symptoms after taking quercetin. A significant number of users, for example, noted that it helped alleviate allergy symptoms and reduce inflammatory responses related to heart disease (Read Review). One reviewer mentioned that quercetin played a pivotal role in normalizing a fever that persisted for a year while addressing heart disease concerns (Read Review).

Additionally, several users have shared experiences of improved cardiovascular health, with many reporting reductions in blood pressure and enhanced endurance during physical activities (Read Review). Users have highlighted its impact on supporting overall heart health through antioxidative and anti-inflammatory processes, emphasizing its role in managing heart disease risks and promoting recovery (Read Review). However, it's essential to remember that individual results can vary, as some users reported no noticeable effects or adverse reactions (Read Review). Thus, while many appreciate the benefits of quercetin, personal health conditions and responses play a crucial role in treatment outcomes.

Based on user reviews, many individuals report positive experiences when combining quercetin with other supplements to manage heart disease. For instance, several users highlighted the benefits of pairing quercetin with bromelain, citing enhanced immune response and reductions in inflammation, which collectively contribute to better heart health outcomes (Read Review). One reviewer noted that the combination of quercetin and CoQ10 yielded excellent results, particularly in managing blood pressure and supporting overall cardiovascular wellness (Read Review).

Additionally, some users shared their success stories regarding taking quercetin alongside probiotics or vitamins C and zinc, which reportedly boosted their energy and immune support during recovery from heart-related issues (Read Review) (Read Review). However, while many found these combinations beneficial, it is essential to approach such regimens cautiously, as some users experienced adverse effects or limited results (Read Review). This highlights the significance of individual health conditions and responses to supplementation, emphasizing the need for a personalized approach to managing heart disease.

Users report varying opinions on the ideal dose of quercetin for treating heart disease. Some have found success with higher doses after initial recommendations, highlighting improvements in health conditions related to their heart problems. For example, one user mentioned a significant turnaround in their unexplained fever after switching to a higher dose upon their doctor's suggestion (Read Review). Another user observed benefits from doses that supported blood vessel strength and helped reduce risks associated with heart disease (Read Review).

Additionally, users emphasized quercetin's ability to act as a natural anti-inflammatory, aiding in heart health when taken consistently (Read Review). While there is no consensus on a specific dosage, several reviews suggest that starting with 500 mg was beneficial for many, as noted by users who experienced positive changes in their conditions (Read Review). However, it is essential to consult a healthcare professional to determine the right dose tailored to individual needs, especially for those with underlying health conditions.

8.8
Allergy relief
I started taking quercetin for allergies, as well as for its antioxidant properties and to prevent respiratory diseases. The capsules are easy to swallow and have a pleasant aroma. After a week of taking 500 mg, I noticed improvements in my allergies and digestion. Quercetin also strengthens blood vessel walls and helps reduce the risks associated with heart disease.
9.5
Temperature normalised
Quercetin remarkably helped me return my unexplained fever to normal, which persisted for a year despite concerns about my heart disease. I initially began it upon my doctor’s suggestion and found it effective after switching to a higher dose.
8.8
Energy restoration
My naturopath suggested I take quercetin daily, especially during my recovery from heart surgery. This supplement, combined with probiotics, significantly boosted my energy levels, and I now use it as part of a regimen to protect against COVID. The quality has been excellent.
9.5
Natural antihistamine
Having suffered from allergies and asthma for years, I turned to natural solutions like quercetin. This supplement reduces my allergic reactions and systemic inflammation, helping mitigate symptoms associated with heart disease.
9.5
Supports heart health
Quercetin has numerous benefits, including aiding in the elimination of inflammation and supporting heart health. It strengthens blood vessels, making physical exertion easier. I take this supplement periodically to experience its advantages.
8.8
Prevents heart complications
I highly recommend quercetin for those recovering from COVID and for vascular repair. It is a potent antioxidant that protects cells and prevents heart disease, particularly by inhibiting histamine production.
2.3
No benefit felt
I tried quercetin for pollen allergies, but it did not help. I didn't notice any positive effects on my immunity or heart disease, as I fell ill with a respiratory illness while taking it.
8.8
Cardiovascular protection
Quercetin is a potent antioxidant from the flavonoids, aiding cell membrane protection against free radicals and strengthening small blood vessels, thus preventing heart disease. Nau Foods' quercetin, combined with bromelain, boosts immune cell activity and antibody production. It effectively treats arthritis, asthma, and inflammation while combating viral infections.
6.3
Benefits for heart
Excellent quality product with beneficial ingredients, particularly CoQ10. It acts as an antioxidant and provides good support for my heart health.
8.8
Shortened cold duration
I initially sought quercetin with bromelain for its health benefits and to ease some pain. I found it also improved my immune system remarkably. After taking it alongside vitamin C and zinc during a cold, I was astounded at how quickly it alleviated my symptoms.
1.3
Adverse effects observed
The effectiveness was disappointing with adverse effects, including adrenal fatigue and arrhythmia, which made me cautious about the use of quercetin. I took it to address heart disease and histamine levels but experienced increased heart rate and other complications instead.
9
Quercetin shows promise for heart recovery
We investigated how quercetin, a natural compound found in fruits and vegetables, could help prevent damage after a heart attack (myocardial infarction). Our study used adult male mice to analyze the effects of two weeks of quercetin treatment before simulating a heart attack.

The results were encouraging: quercetin improved heart function, enhanced survival rates, and minimized heart damage. Additionally, it appeared to reduce inflammation and increase protective immune responses in the heart. Overall, quercetin shows potential as a helpful player in heart disease recovery.
We aimed to understand how quercetin, a natural flavonoid, might help protect against heart issues linked to hormonal changes in postmenopausal conditions. In our study, ovariectomized female rats received either quercetin treatment or a control substance for four weeks.

We found that quercetin significantly reduced heart damage and the risk of abnormal heart rhythms after restoration of blood flow. Additionally, it seemed to support healthier mitochondrial function. Our findings suggest that quercetin could be beneficial in managing heart health during menopause.
8
Quercetin shows promise against heart injury
This study investigated how quercetin (QUE) affects heart injury linked to sepsis. By mimicking sepsis-induced cardiomyopathy in human heart cells, we found that LPS treatment leads to reduced cell growth and increased injury.

However, QUE showed potential to counter these effects, decreasing cell death and inflammation. Additionally, QUE worked by regulating the ALOX5/PI3K/AKT pathway, indicating a promising role in treating heart conditions related to sepsis.
8
Isoquercitrin aids heart protection
We investigated the effects of isoquercitrin (IQC) in combating cardiotoxicity caused by the cancer drug doxorubicin (DOX). Analysis highlighted over 7,800 genes affected by DOX, with IQC showing significant promise by downregulating key inflammatory genes.

Our findings suggest IQC can help reduce inflammation and oxidative stress in heart cells, marking it as a potential natural therapy for heart damage during cancer treatment. We identified critical immune markers that IQC targets, paving the way for better strategies to support heart health in cancer patients.
8
Quercetin shows promise against cardiotoxicity
We investigated the potential benefits of quercetin (QE) in combating heart damage caused by aluminum phosphide (AlP) in a rat model. The study divided the rats into groups, including controls and those treated with QE after exposure to AlP.

We noticed that QE significantly improved heart function and reduced damage, as shown by better biomarkers and lower inflammation levels. This suggests that quercetin has promising antioxidant and anti-inflammatory properties that could help in treating cardiotoxicity from AlP exposure.

References

  1. Wang L, Lin S, Wei Q, Li T, Mo Q, et al. Preventive Administration of Quercetin Promotes Survival and Reduces Adverse Ventricular Remodeling after myocardial infarction through facilitating M2-like macrophage polarization. Int Immunopharmacol. 2025;151:114296. doi:10.1016/j.intimp.2025.114296
  2. Alam H, Bailing W, Zhao F, Ullah H, Ullah I, et al. An Integrated Network Pharmacology and RNA-seq Approach for Exploring the Protective Effect of Isoquercitrin in Doxorubicin-Induced Cardiotoxicity: Identification of Novel Genes. Cardiovasc Toxicol. 2025;25:541. doi:10.1007/s12012-025-09968-4
  3. Domingos AE, Breves CMDC, Boa LF, de Souza IIA, Maciel L, et al. Quercetin Reduces the Susceptibility to Cardiac Reperfusion Arrhythmias in Ovariectomized Rats. Mol Nutr Food Res. 2025;69:e202400284. doi:10.1002/mnfr.202400284
  4. Long X, Tao S, Yang S, Li S, Rao L, et al. Quercetin improves heart failure by inhibiting cardiomyocyte apoptosis suppressing the MAPK signaling pathway. Nan Fang Yi Ke Da Xue Xue Bao. 2025;45:187. doi:10.12122/j.issn.1673-4254.2025.01.22
  5. Scalise M, Cianflone E, Quercia C, Pagano L, Chiefalo A, et al. Senolytics rejuvenate aging cardiomyopathy in human cardiac organoids. Mech Ageing Dev. 2025;223:112007. doi:10.1016/j.mad.2024.112007
  6. Goshovska Y, Pashevin D, Goncharov S, Lapikova-Bryhinska T, Lisovyi O, et al. Quercetin is a potential therapy for post-infarction NETosis formation. Naunyn Schmiedebergs Arch Pharmacol. 2025;398:5705. doi:10.1007/s00210-024-03602-w
  7. de Oliveira Silva T, Lunardon G, Lino CA, de Almeida Silva A, Zhang S, et al. Senescent cell depletion alleviates obesity-related metabolic and cardiac disorders. Mol Metab. 2025;91:102065. doi:10.1016/j.molmet.2024.102065
  8. Mostafa EMA, Atta R, Maher SA, El-Kherbetawy MK, Ameen AM. Quercetin and its potential therapeutic effects on aluminum phosphide-induced cardiotoxicity in rats: Role of NOX4, FOXO1, ERK1/2, and NF-κB. Tissue Cell. 2024;91:102622. doi:10.1016/j.tice.2024.102622
  9. An W, Tian Q, Guo P, Chen M, Zhang T, et al. Danggui Buxue Decoction and its components dilate coronary artery through activating the inward rectification K channels pathway. J Ethnopharmacol. 2025;338:119064. doi:10.1016/j.jep.2024.119064
  10. Song J, Li S, Zhang B, Wu J, Zhong A. Quercetin protects human coronary artery endothelial cells against hypoxia/reoxygenation-induced mitochondrial apoptosis via the Nrf2/HO-1 axis. Biomed Res. 2024;45:197. doi:10.2220/biomedres.45.197
  11. Guan F, Du H, Li J, Ren H, Dong A. Quercetin Alleviates LPS-Stimulated Myocardial Injury through Regulating ALOX5/PI3K/AKT Pathway in Sepsis. Cardiovasc Toxicol. 2024;24:1116. doi:10.1007/s12012-024-09901-1
  12. Chen Q, Wang J, Sun L, Ba B, Shen D. Mechanism of Astragalus membranaceus (Huangqi, HQ) for treatment of heart failure based on network pharmacology and molecular docking. J Cell Mol Med. 2024;28:e18331. doi:10.1111/jcmm.18331
  13. Chen YF, Qiu Q, Wang L, Li XR, Zhou S, et al. Quercetin Ameliorates Myocardial Injury in Diabetic Rats by Regulating Autophagy and Apoptosis through AMPK/mTOR Signaling Pathway. Am J Chin Med. 2024;52:841. doi:10.1142/S0192415X24500344
  14. Wang X, Xing X, Huang P, Zhang Z, Zhou Z, et al. A Chinese classical prescription Xuefu Zhuyu decoction in the treatment of coronary heart disease: An overview. Heliyon. 2024;10:e28919. doi:10.1016/j.heliyon.2024.e28919
  15. Hu D, Li R, Li Y, Wang M, Wang L, et al. Inflammation-Targeted Nanomedicines Alleviate Oxidative Stress and Reprogram Macrophages Polarization for Myocardial Infarction Treatment. Adv Sci (Weinh). 2024;11:e2308910. doi:10.1002/advs.202308910
  16. Jing J, Fang S, Li Y, Liu W, Wang C, et al. An enhanced cardio-protective effect of nanoparticles loaded with active components from Polygonum orientale L. against isoproterenol-induced myocardial ischemia in rats. Int J Pharm. 2024;655:124047. doi:10.1016/j.ijpharm.2024.124047
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