Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 16 Researches
8.3
USERS' SCORE
Good
Based on 16 Reviews
8.2
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
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.
Read More
8
We investigated how isoquercetin interacts with heart attack, using a rat model to uncover its protective effects. Our findings showed that isoquercetin reduced heart damage, inflammation, and cell death associated with myocardial infarction. It also improved certain enzyme levels and suppressed a key signaling pathway linked to heart stress. While promising, these results suggest isoquercetin may be beneficial for heart health, though further research in humans is needed to confirm its effectiveness.
Read More
9
Quercetin enhances heart recovery post-MI
We explored how quercetin, a common bioflavonoid found in fruits and vegetables, might impact recovery after a heart attack. In our study with mice, treating them with quercetin before inducing a heart attack led to better heart function and increased survival rates.
We noticed that quercetin helped reduce heart swelling and injury size, while also lowering inflammation. Notably, it encouraged a shift in immune cells to a more healing state. Overall, while quercetin shows promise, further research is needed to fully understand its potential in heart attack prevention and treatment.
We noticed that quercetin helped reduce heart swelling and injury size, while also lowering inflammation. Notably, it encouraged a shift in immune cells to a more healing state. Overall, while quercetin shows promise, further research is needed to fully understand its potential in heart attack prevention and treatment.
Read More
Most Useful Reviews
9
Supports heart health
5 people found this helpful
I have been taking quercetin since September 2020. I use this drug alongside Quercetin from Paradise Herbs for my varicose veins, preparing for surgery. My recent ultrasound showed calm vessels without inflammation, and my heart scan was normal. After four cycles of chemotherapy, I believe this supplement, along with others, helped reduce my inflammation and support my heart. Be healthy and enjoy life!
Read More
7.5
Reduces angina severity
6 people found this helpful
This quercetin is beneficial for heart health, helping to lower blood pressure and lessen the severity of angina attacks. I would recommend it to others.
Read More
7.5
Recommended after heart attack
5 people found this helpful
I have been using Now Foods Quercetin for almost ten years, following my heart attack and triple bypass, as recommended by two cardiologists.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 16 Researches
8.3
- All Researches
9
Quercetin enhances heart recovery post-MI
We explored how quercetin, a common bioflavonoid found in fruits and vegetables, might impact recovery after a heart attack. In our study with mice, treating them with quercetin before inducing a heart attack led to better heart function and increased survival rates.
We noticed that quercetin helped reduce heart swelling and injury size, while also lowering inflammation. Notably, it encouraged a shift in immune cells to a more healing state. Overall, while quercetin shows promise, further research is needed to fully understand its potential in heart attack prevention and treatment.
We noticed that quercetin helped reduce heart swelling and injury size, while also lowering inflammation. Notably, it encouraged a shift in immune cells to a more healing state. Overall, while quercetin shows promise, further research is needed to fully understand its potential in heart attack prevention and treatment.
Read More
9
We investigated how quercetin influences recovery after a heart attack. By inducing heart attacks in rats and treating them with quercetin, we found that it actively reduced harmful protein levels associated with heart damage.
Specifically, quercetin decreased the expression of circPAN3 and PTEN while boosting miR-221, which are important for cell survival. These changes suggest that quercetin may help protect heart tissue after a myocardial infarction, improving heart function.
Specifically, quercetin decreased the expression of circPAN3 and PTEN while boosting miR-221, which are important for cell survival. These changes suggest that quercetin may help protect heart tissue after a myocardial infarction, improving heart function.
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9
We investigated how quercetin, combined with another drug, affects heart recovery after a heart attack in older female mice.
This study showed that using senolytics, specifically dasatinib and quercetin, helped improve heart function and repair by clearing out toxic, aged cells in the heart.
By eliminating these harmful cells, we enhanced heart performance and regeneration.
Overall, our findings suggest that targeting senescent cells could be a promising approach for improving heart health in aging females after a heart attack.
This study showed that using senolytics, specifically dasatinib and quercetin, helped improve heart function and repair by clearing out toxic, aged cells in the heart.
By eliminating these harmful cells, we enhanced heart performance and regeneration.
Overall, our findings suggest that targeting senescent cells could be a promising approach for improving heart health in aging females after a heart attack.
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9
We explored the effects of hyperoside (Hyp), a compound from traditional Chinese medicine, on heart attacks in mice. In our study, we created a heart attack model and treated the mice with varying doses of Hyp for two weeks.
We observed significant improvements in heart function and reduced heart damage in the Hyp-treated groups compared to those without treatment. Hyp works partly by enhancing autophagy, which helps control inflammation related to heart injury.
Overall, our findings suggest that hyperoside may offer protective benefits for heart health.
We observed significant improvements in heart function and reduced heart damage in the Hyp-treated groups compared to those without treatment. Hyp works partly by enhancing autophagy, which helps control inflammation related to heart injury.
Overall, our findings suggest that hyperoside may offer protective benefits for heart health.
Read More
9
We explored whether quercetin can protect against heart attacks in rats through its influence on specific cellular pathways. The study involved different groups of rats, some receiving quercetin before inducing heart attacks. The results showed that quercetin reduced heart damage, improved heart function, and decreased harmful substances in the body.
However, it’s important to note that while quercetin had protective effects, its full impact on heart attack treatment remains unclear. Overall, quercetin appears beneficial by enhancing antioxidant defenses and influencing relevant signaling pathways.
However, it’s important to note that while quercetin had protective effects, its full impact on heart attack treatment remains unclear. Overall, quercetin appears beneficial by enhancing antioxidant defenses and influencing relevant signaling pathways.
Read More
User Reviews
USERS' SCORE
Good
Based on 16 Reviews
8.2
- All Reviews
- Positive Reviews
- Negative Reviews
9
Supports heart health
5 people found this helpful
I have been taking quercetin since September 2020. I use this drug alongside Quercetin from Paradise Herbs for my varicose veins, preparing for surgery. My recent ultrasound showed calm vessels without inflammation, and my heart scan was normal. After four cycles of chemotherapy, I believe this supplement, along with others, helped reduce my inflammation and support my heart. Be healthy and enjoy life!
Read More
7.5
Reduces angina severity
6 people found this helpful
This quercetin is beneficial for heart health, helping to lower blood pressure and lessen the severity of angina attacks. I would recommend it to others.
Read More
7.5
Recommended after heart attack
5 people found this helpful
I have been using Now Foods Quercetin for almost ten years, following my heart attack and triple bypass, as recommended by two cardiologists.
Read More
7.5
Must-have post-heart attack
3 people found this helpful
This supplement is excellent for heart health. My mother and grandmother take it, especially after recovering from COVID. Quercetin is a powerful antioxidant from the flavonoid group, protecting cell membranes and strengthening small blood vessels, making it useful for preventing cardiovascular diseases.
Read More
9
Effective for breathing issues
2 people found this helpful
Quercetin is effective for my grandmother, who struggles to breathe after walking due to her coronary heart disease. It has helped her shortness of breath considerably.
Read More
Frequently Asked Questions
7.5
Reduced steroid reliance
1 people found this helpful
I've been relying on steroids for a year due to my skin condition. After taking quercetin for two weeks, I managed to reduce my steroid dosage to one pill every 3-4 days, with no serious attacks. I will continue to observe the results.
7.5
Recommended after heart attack
5 people found this helpful
I have been using Now Foods Quercetin for almost ten years, following my heart attack and triple bypass, as recommended by two cardiologists.
9
Boosted recovery post-surgery
1 people found this helpful
My naturopath recommended daily quercetin while I recovered from heart surgery, and it efficiently boosted my energy levels. I now take it as part of Dr Korey’s regime to protect against COVID. The quality was excellent.
7.5
Reduces angina severity
6 people found this helpful
This quercetin is beneficial for heart health, helping to lower blood pressure and lessen the severity of angina attacks. I would recommend it to others.
9
Effective for breathing issues
2 people found this helpful
Quercetin is effective for my grandmother, who struggles to breathe after walking due to her coronary heart disease. It has helped her shortness of breath considerably.
9
Supports heart health
5 people found this helpful
I have been taking quercetin since September 2020. I use this drug alongside Quercetin from Paradise Herbs for my varicose veins, preparing for surgery. My recent ultrasound showed calm vessels without inflammation, and my heart scan was normal. After four cycles of chemotherapy, I believe this supplement, along with others, helped reduce my inflammation and support my heart. Be healthy and enjoy life!
7.5
Life-extending benefits
2 people found this helpful
I see quercetin as a life-prolonging drug. It has improved kidney function, heart health, and my immune system, while also reducing joint inflammation when taken with bromelain. I appreciate its benefits, especially for my elderly family members.
7.5
Supports heart muscle
1 people found this helpful
I take 400 mg of Resveratrol with two capsules of Quercetin daily, as it has been medically proven to support heart muscle health.
7.5
Lowers heart risk
This product not only protected me from Covid-19 but also effectively lowered my blood pressure and reduced my heart attack risk.
7.5
Positive health effects
1 people found this helpful
Quercetin is an effective antioxidant that supports cardiovascular health by lowering the risk of heart attacks. I noticed a significant reduction in oxidative stress. It helped during our Covid illness; we took 1 capsule three times daily. Thankfully, we recovered from pneumonia. There are also benefits for arterial hypertension and prostate adenoma.
9
Quercetin enhances heart recovery post-MI
We explored how quercetin, a common bioflavonoid found in fruits and vegetables, might impact recovery after a heart attack. In our study with mice, treating them with quercetin before inducing a heart attack led to better heart function and increased survival rates.
We noticed that quercetin helped reduce heart swelling and injury size, while also lowering inflammation. Notably, it encouraged a shift in immune cells to a more healing state. Overall, while quercetin shows promise, further research is needed to fully understand its potential in heart attack prevention and treatment.
We noticed that quercetin helped reduce heart swelling and injury size, while also lowering inflammation. Notably, it encouraged a shift in immune cells to a more healing state. Overall, while quercetin shows promise, further research is needed to fully understand its potential in heart attack prevention and treatment.
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.
8
We aimed to understand how quercetin affects heart function and ischemia in patients with stable coronary heart disease (CHD). In our study, 85 CHD patients received quercetin alongside standard treatment, while a larger group continued standard therapy alone.
After two months, we noticed improvements in heart function for both groups, but the quercetin group showed significant benefits, especially in reducing episodes of myocardial ischemia and ventricular contractions. Our findings suggest quercetin has promising cardioprotective effects in CHD patients.
After two months, we noticed improvements in heart function for both groups, but the quercetin group showed significant benefits, especially in reducing episodes of myocardial ischemia and ventricular contractions. Our findings suggest quercetin has promising cardioprotective effects in CHD patients.
References
- 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
- 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
- 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
- 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
- Liu C, Huang J, Qiu J, Jiang H, Liang S, et al. Quercitrin improves cardiac remodeling following myocardial infarction by regulating macrophage polarization and metabolic reprogramming. Phytomedicine. 2024;127:155467. doi:10.1016/j.phymed.2024.155467
- Farazi MM, Rostamzadeh F, Jafarinejad-Farsangi S, Moazam Jazi M, Jafari E, et al. CircPAN3/miR-221/PTEN axis and apoptosis in myocardial Infarction: Quercetin's regulatory effects. Gene. 2024;909:148316. doi:10.1016/j.gene.2024.148316
- Kozhukhov S, Parkhomenko A, Lutay Y, Dovganych N. Impact of quercetin in patients with myocardial infarction. A multicenter, randomized, and open-label pilot study. Hellenic J Cardiol. 2024;76:68. doi:10.1016/j.hjc.2023.08.004
- Salerno N, Marino F, Scalise M, Salerno L, Molinaro C, et al. Pharmacological clearance of senescent cells improves cardiac remodeling and function after myocardial infarction in female aged mice. Mech Ageing Dev. 2022;208:111740. doi:10.1016/j.mad.2022.111740
- Chen L, Wu X, Wang W, Wang X, Ma J. Quercetin with lycopene modulates enzymic antioxidant genes pathway in isoproterenol cardiotoxicity in rats. Libyan J Med. 2021;16:1943924. doi:10.1080/19932820.2021.1943924
- Yang Y, Li J, Rao T, Fang Z, Zhang J. The role and mechanism of hyperoside against myocardial infarction in mice by regulating autophagy via NLRP1 inflammation pathway. J Ethnopharmacol. 2021;276:114187. doi:10.1016/j.jep.2021.114187
- Albadrani GM, Binmowyna MN, Bin-Jumah MN, El-Akabawy G, Aldera H, et al. Quercetin protects against experimentally-induced myocardial infarction in rats by an antioxidant potential and concomitant activation of signal transducer and activator of transcription 3. J Physiol Pharmacol. 2020;71. doi:10.26402/jpp.2020.6.11
- Liu CJ, Yao L, Hu YM, Zhao BT. Effect of Quercetin-Loaded Mesoporous Silica Nanoparticles on Myocardial Ischemia-Reperfusion Injury in Rats and Its Mechanism. Int J Nanomedicine. 2021;16:741. doi:10.2147/IJN.S277377
- Dehghani F, Sezavar Seyedi Jandaghi SH, Janani L, Sarebanhassanabadi M, Emamat H, et al. Effects of quercetin supplementation on inflammatory factors and quality of life in post-myocardial infarction patients: A double blind, placebo-controlled, randomized clinical trial. Phytother Res. 2021;35:2085. doi:10.1002/ptr.6955
- Ma C, Jiang Y, Zhang X, Chen X, Liu Z, et al. Isoquercetin ameliorates myocardial infarction through anti-inflammation and anti-apoptosis factor and regulating TLR4-NF-κB signal pathway. Mol Med Rep. 2018;17:6675. doi:10.3892/mmr.2018.8709
- Chekalina NI, Shut SV, Trybrat TA, Burmak YH, Petrov YY, et al. Effect of quercetin on parameters of central hemodynamics and myocardial ischemia in patients with stable coronary heart disease. Wiad Lek. 2017;70:707.
- Kumar M, Kasala ER, Bodduluru LN, Kumar V, Lahkar M. Molecular and biochemical evidence on the protective effects of quercetin in isoproterenol-induced acute myocardial injury in rats. J Biochem Mol Toxicol. 2017;31:1. doi:10.1002/jbt.21832
