Best Quercetin Supplements Ranked for 2018 (Top 10 Brands)

This is our official list of the best selling quercetin supplements on the market right now.

These 10 quercetin brands have been ranked because they dominate the e-commerce sales charts, fitness bloggers love them and they have the highest user reviews online.

Top 10 Quercetin Products Compared

Heads up, there are affiliate links in this article, so if you buy something, we get a cut of the sale.


1. NOW Foods Quercetin W/Bromelain

NOW Foods Quercetin W Bromelain

NOW Quercetin with Bromelain provides 800 mg of quercetin per serving. Serving size is two tablets. The bottle contains 120 capsules.

Specs

  • Provides 800 mg of quercetin per serving
  • Provides 165 mg of bromelain per serving
  • Vegetarian
  • Non-GMO
  • Contains no common allergens

Who Makes It?

NOW Foods has a range of more than 500 dietary supplements. They are a U.S.-based company that was established in 1968. Since then, they have become a leader in the dietary products industry. Their mission is to empower people to lead healthier lives. This year alone, they have won a number of awards including Clean Eating Magazine’s Clean Choice Award and Remedy Magazine’s Digestion Award.

Bottom Line

This is an excellent quercetin supplement. The addition of bromelain makes the bioflavonoids more readily available for your body to absorb. The product in non-GMO, vegan-friendly, and contains no common allergens. This is a great quercetin supplement choice and is a good price.

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Where to Buy NOW Foods Quercetin
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2. Jarrow Formulas Quercetin

Jarrow Formulas Quercetin

Jarrow Formulas Quercetin provides 500 mg of quercetin per serving. Serving size is one tablet. The bottle contains 200 capsules.

Specs

  • Provides 500 mg of quercetin per serving
  • Contains no common allergens
  • Vegan-friendly
  • Contains no other bioflavonoids
  • Good value

Who Makes It?

Jarrow Supplements is based in Los Angeles, California. The company was established in 1977. Today it provides nutritional supplements to countries throughout the world. Jarrow’s complete range includes, vitamins, minerals, enzymes, probiotics, amino acids, herbal concentrates, and enteral nutrition products.

Bottom Line

These are good quercetin pills. The dosage is low enough that you can increase steadily if you wish to. They are vegetarian and contain no common allergens. Unfortunately, this supplement contains no other bioflavonoids apart from quercetin, which means it’s not as bioavailable as some of the other quercetin supplements on the market.

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Where to Buy Jarrow Formulas Quercetin
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3. Doctor’s Best Quercetin/Bromelain

Doctor's Best Quercetin Bromelain

Doctor’s Best Quercetin Bromelain provides 500 mg of quercetin per serving. Serving size is two tablets. The bottle contains 90 capsules.

Specs

  • Provides 500 mg of quercetin per serving
  • Provides 250 mg of bromelain per serving
  • Vegan-friendly
  • Non-GMO
  • Gluten-free

Who Makes It?

Doctor’s Best was established in 1990 by a group of physicians. All their supplement formulas are based on science-based research. They offer a range of more than 200 products, all formulated with branded ingredients.

Bottom Line

Doctor’s Best is a powerful quercetin supplement because it also contains the bioflavonoid bromelain, which creates a synergy that makes both nutrients easier to absorb. It’s made by a reputable company and is gluten-free and contains no common allergens.

ⓘ If you buy something using the link below, we get a small commission.

Where to Buy Doctor’s Best Quercetin
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4. Solgar Quercetin Complex with Ester-C

Solgar Quercetin Complex with Ester-C

Solgar Quercetin Complex with Ester-C provides 500 mg of quercetin per serving. Serving size is two tablets. The bottle contains 50 capsules.

Specs

  • Provides 500 mg of quercetin per serving
  • Contains other bioflavonoids
  • Gluten-free
  • Non-GMO
  • Vegan

Who Makes It?

Solgar provides more than 450 dietary supplements to retailer worldwide. They have been manufacturing supplements since 1947. They have won numerous awards for their formulas including the Best of Supplements Award – Sleep Category for their melatonin supplement.

Bottom Line

This is one of the best quercetin supplements on the market. Not only does is contain 500 mg of quercetin, it also has 50 mg of calcium, and 50 mg each of bromelain, rosehip, acerola, rutin, and citrus bioflavonoid complex. It’s also vegan, non-GMO, and gluten-free.

ⓘ If you buy something using the link below, we get a small commission.

Where to Buy Solgar Quercetin Complex
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5. Source Naturals Activated Quercetin

Source Naturals Activated Quercetin

Source Naturals Activated Quercetin provides 1 g of quercetin per serving. Serving size is three tablets. The bottle contains 200 capsules.

Specs

  • Provides 1 g of quercetin per serving
  • Contains bromelain
  • Contains vitamin C and magnesium
  • No common allergens
  • No artificial additives

Who Makes It?

Source Naturals put their customers’ wellbeing first. They are a reputable U.S-based company. Source Naturals products are formulated centered on science-based research.

Bottom Line

These powerful quercetin pills contain a whole gram of quercetin per serving. They also contain other bioflavonoids to potentially increase the bioavailability of quercetin.

ⓘ If you buy something using the link below, we get a small commission.

Where to Buy Source Naturals Activated Quercetin
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6. Life Extension Optimized Quercetin

Life Extension Optimized Quercetin

LifeExtension Optimized Quercetin provides 400 mg of quercetin per serving. Serving size is one tablet. The bottle contains 60 capsules.

Specs

  • Provides 400 mg of quercetin per serving
  • Contains vitamin C
  • Non-GMO
  • Vegan
  • Contains fillers

Who Makes It?

The Life Extension Foundation was established in 1980. It is a non-profit organization whose mission is to extend the healthy human lifespan by means of scientific methods that can eradicate disease and control aging. It is one of the world’s largest organizations of its kind.

Bottom Line

Another good quercetin supplement made by a prestigious company. The capsules are made with non-GMO ingredients, they are gluten-free, and vegan. This supplement is also good value for money.

7. Solaray Quercetin Capsules

Solaray Quercetin Capsules

Solaray Mega Quercetin provides 1,200 mg of quercetin per serving. Serving size is two tablets. The bottle contains 60 capsules.

Specs

  • Provides 1,200 mg of quercetin per serving
  • Vegan-friendly
  • Contains other bioflavonoids
  • Great reviews

Who Makes It?

Solaray is part of the Nutraceutical family of brands. They are based in the state of Utah and have been in business since 1973, with a focus on blended herbal supplements.

Bottom Line

There’s a reason why this supplement is called Mega Quercetin, it’s because it is one of the most powerful quercetin supplements on the market, with a total of 1.2 grams of quercetin. It’s also good value for money.

8. Amazing Nutrition Amazing Formulas Quercetin

Amazing Nutrition Amazing Formulas Quercetin

Amazing Nutrition Amazing Formulas Quercetin provides 500 mg of quercetin per serving. Serving size is one tablet. The bottle contains 120 capsules.

Specs

  • Provides 500 mg of quercetin per serving
  • Vegan-friendly
  • Made in accordance with Good Manufacturing Practices
  • Contains fillers
  • Good reviews

Who Makes It?

Amazing Nutrition claims to be one of Amazon’s top sellers of nutritional supplements. They are dedicated to formulating dietary supplements with ingredients that your body can fully use. All their products are tested for purity.

Bottom Line

These are effective quercetin pills if you’re looking for a supplement with a lower dosage range. They are vegan and rigorously tested, but unfortunately, they do contain fillers.

9. Pure Encapsulations – Quercetin

Pure Encapsulations Quercetin

Pure Encapsulations Quercetin provides 250 mg of quercetin per serving. Serving size is one tablet. The bottle contains 120 capsules.

Specs

  • Provides 250 mg of quercetin per serving
  • Non-GMO
  • No additives
  • Vegan-friendly
  • No common allergens
  • Low dosage

Who Makes It?

Pure Encapsulations Is a U.S.-based company that manufactures hypoallergenic dietary supplements made from pure, high-quality ingredients.

Bottom Line

This quercetin supplement has a low dosage per capsule, which is good if you’re new to quercetin and you want to start off low and build up gradually. It’s non-GMO, vegan, and contains no additives or common allergens.

10. Thorne Research – Quercetin Phytosome

Thorne Research - Quercetin Phytosome

Thorne Research Quercetin Phytosome provides 250 mg of quercetin per serving. Serving size is one tablet. The bottle contains 60 capsules.

Specs

  • Provides 250 mg of quercetin per serving
  • Contains no other bioflavonoids
  • No common allergens
  • Gluten-free
  • Contains fillers

Who Makes It?

Thorne Research is comprised of a team of medical professionals, science researchers, and engineers. They are dedicated to formulating nutritional supplements made with pure ingredients that have been tested for their purity and potency.

Bottom Line

Thorne Research has an excellent reputation and though this is quite a good quercetin supplement, it contains low-potency capsules and unfortunately does not contain a combination of bioflavonoids.

Quercetin Supplements Guide

What is Quercetin?

Quercetin is a form of flavonoid antioxidant found in plants and foods such as peppers, apples, dark cherries, tomatoes, leafy green vegetables, citrus fruits, and onions. It is considered to be one of the most powerful natural antioxidants, which are important for inhibiting the effects of free radicals.

Free radicals are groups of atoms which have an unpaired number of electrons. Because of this, they are volatile, and their unpaired electron makes them bump into other molecules and steal one of their electrons.

When this happens, the structure of the victim molecule is changed, and it now becomes a free radical. This can rapidly produce a domino effect, and millions of molecules can be altered rapidly. When free radicals steal electrons from important structures such as DNA, enzymes, and protein molecules, their normal functioning as drastically altered. Such free radical damage can result in degenerative diseases such as cancer and heart disease.

Your body is generally adept at keeping free radicals in check. It does so with the help of free radical scavengers. The scavengers neutralize volatile free radicals, rendering them harmless. However, problems begin to arise when your body has too many free radicals, and they begin to cause damage to the immune system or genetic material. To avoid this, you need to recruit a defense system of antioxidants, such as quercetin.

Uses & Benefits of Quercetin

As well as being a powerful antioxidant, quercetin has numerous other health benefits. Here is a rundown of quercetin benefits.

  • Antioxidant: Quercetin is a potent antioxidant, so it can help protect the body’s cells from damage caused by free radicals.
  • Blood pressure: In a 2007 study published in the Journal of Nutrition, participants with prehypertension and stage 1 hypertension (44 patients in total), were given 365 mg quercetin twice each day in a two-phase trial. During the first phase, each subject was given the twice-daily dose of quercetin for a period of fourteen days. During the second phase, the subjects were enrolled in either a supplementation phase or a placebo phase. The two phases were separated by a two-week washout period. The result showed that quercetin supplementation did reduce blood pressure in stage 1 hypertensive subjects. More research is needed.
  • Lipids: A 2012 preliminary study published in Medicinski Arhiv, revealed that quercetin may be able to lower blood lipids. More research is needed.

A number of other health claims about quercetin are frequently circulated by supplement manufacturers, these include quercetin can:

  • Increase the capacity for running
  • Improve glucose levels
  • Boost fat oxidation
  • Improve total body hydrations during exercise
  • Improve heart rate
  • Improve inflammation
  • Improve sleep quality
  • Improve uric acid concentrations

Clinical trials testing these claims have been unable to find any evidence to support any of them.

How to Take Quercetin

There is no standardized recommended quercetin dosage. Examine.com suggests a quercetin supplement dosage within the range of 12.5 to 25 mg per kilogram of body weight.

Their research team also suggests that if you are taking a quercetin supplement, taking it along with another bioflavonoid, such as green tea, resveratrol, bromelain, or genistein may increase the benefits by synergistically increasing the potency.

Side Effects and Precautions

Quercetin is generally considered to be safe when taken orally at the suggested dosage. Common side effects include headache, dizziness, shortness of breath, and upset stomach.

Quercetin may increase intestinal permeability. The intestinal barrier in the gut is only one cell thick. Prolonged heavy exercise can trigger leaky gut. This occurs when the intestinal barrier becomes compromised. Symptoms include gas, bloating, chronic diarrhea, muscle and joint pain, fatigue, and headaches. A 2011 study published in the American Journal of Physiology showed that taking a quercetin supplement while exercising exhaustively can impair the intestinal barrier and increase the risk of leaky gut syndrome.

Taking a quercetin supplement while you are on Hormone Replacement Therapy (HRT) may increase your estradiol and inhibit the effectiveness of other forms of estrogen, and so should be avoided.

Consult your doctor before taking a quercetin supplement if you are taking the calcium channel blocker felodipine for high blood pressure.

What to Look for in a Good Quercetin Supplement

When you are looking for a high-quality quercetin supplement, one important thing to take into consideration is the form it takes. The form of quercetin that is most readily absorbed by the human body is quercetin dihydrate. Quercetin glycoside, aglycone, and rutinoside are not as bioavailable.

You should also look for a supplement that is non-GMO and made with organic ingredients that have been tested for purity. The best quercetin supplements contain no additives, common allergens, or unnecessary fillers.

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Austin Meadows

Written by Austin Meadows

Austin Meadows is an independent writer and consultant specializing in health and wellness topics. With more than 7 years of experience writing in the natural health industry, Austin strives to deliver accurate, concise and research based information to his readers. You can connect with him on LinkedIn.