Best Oil Flavonoids in 2026

- Quercetin 500mg Per Serving

- 120 Servings Per Bottle, 1Veggie Capsule per Serving

- Non-GMO, Gluten Free, Third Party Tested

ANTIOXIDANT SUPPORT: Sports Research quercetin supplement supports antioxidant activity and seasonal immune system function. Just one (1) of our softgels provide 500 mg of quercetin, promoting antioxidant activity and an immunity health support.

CARDIOVASCULAR SUPPORT: This quercetin supplement helps support the cardiovascular system and provides heart health support.

PREMIUM INGREDIENTS: Quercetin is a polyphenolic bioflavonoid and our Quercetin capsules are the most bioavailable form there is. It’s sourced from Brazilian fava trees, then formulated with Coconut MCT Oil and Sunflower Lecithin to help aid with absorption. It is also standardized to 95% quercetin powder in the dihydrate form.

ANTIOXIDANT: Vitamin C with Bioflavonoids provides powerful antioxidant protection, supports immune function and strengthens collagen for healthy skin.*

SUPERIOR QUALITY STANDARDS: Our Vitamin C 1000 mg with Bioflavonoids is carefully tested and produced to superior quality standards.

GLUTEN-FREE: Our Vitamin C 1000 mg with Bioflavonoids is gluten free. It also contains no sugar, salt, yeast, wheat, soy, corn, dairy products, artificial colors, flavors or preservatives.

Ester-c is a breakthrough patented Vitamin C Formula supported with naturally occurring metabolites

Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery

Metabolites help enhance the absorption of Vitamin C by your white blood cells, an important part of your immune system

Ingredients: Cellulose (capsule), Stearic Acid (vegetable source), Magnesium Stearate (vegetable source) and Silica

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Caution: For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Keep out of reach of children.

100% natural vitamin C from organic berries including camu camu, acerola & amla

Contains only natural vitamin C, NO added synthetic ascorbic acid

Helps bolster your healthy immune system; provides protective antioxidant activity; offers extra support during the winter months and pollen season

Max Potency! 1000 Mg Quercetin

120 Veggie Capsules

Vegan. Single Ingredient Supplement

✔️A POTENT COMBINATION TO BOOST THE IMMUNE SYSTEM.* Quercetin is a flavonoid (plant pigment) naturally found in fruits and vegetables. It is found in many foods, such as red wine, onions, green tea, apples, berries, and more. It is known for its Anti-oxidant Properties. *Quercetin Supplements by Gade Nutrition are 1000mg per serving. Now with finest ingredients including a proprietary blend of Quercetin, Bromelain, Vitamin C, D, and zinc.*

✔️THE KEY BENEFITS:* Quercetin with bromelain supports healthy aging, helps to reduce the damage and irritation caused by free radicals, helps promote a normal respiratory function, helps to fuel the immune system, and helps enhance the absorption of zinc.*

✔️ANTI-OXIDANT PROPERTIES.* Quercetin helps to lower the release of histamines,* A compound that is released by cells in response to allergic reactions, one of the most abundant antioxidants in the diet and plays an important role in helping your body combat free radical damage.* Quercetin 500 Mg is offered in Veggie Capsules to suit most diet preferences, promoting general health & well-being*

High concentrated 95% pure quercetin capsules. Natural soy-free sophora japonica source. Highest bioavailable dihydrate form. Rich source of antioxidants and flavonoids.

240 capsules per bottle. 2 capsule serving size. 1,000mg dose with 500mg per capsule. Up to a 4-month supply.

A natural herbal ingredient that provides important phytonutrients for promoting year round immune support in both men and women.

OUTSTANDING VALUE: Our Organic Milk Thistle contains 7500 mg strength per capsule AND 120 capsules per bottle – an amazing value! A single bottle contains up to a 4-month supply. Compare this to other leading brands that require 2 capsules per serving, do not provide a 7500 mg strength dosage, and are not Certified USDA Organic. Our Organic Milk Thistle is a bargain not be found elsewhere!

30:1 EXTRACT FOR MAXIMUM STRENGTH DOSAGE: Our Organic Milk Thistle is made from a potent, concentrated 30:1 extract. A 30:1 extract means that the herb itself has been condensed, so that 30 grams of the original herb are concentrated into a single gram. By using a 30:1 extract, we have created a powerful supplement that is 30X stronger than standard Milk Thistle capsules.

80% SILYMARIN FLAVONOIDS: The "good stuff" in Milk Thistle is called Silymarin Flavonoids. The more Silymarin Flavonoids, the better the Milk Thistle! Our Organic Milk Thistle has been standardized to 80% Silymarin Flavonoids, which means that each capsules contains 200 mg of Silymarin Flavonoids from a 30:1 extract - the highest dosage available!

MAX STRENGTH QUERCETIN: aSquared Nutrition’s maximum strength Quercetin formula contains 500mg of Quercetin powder per capsule and 200 vegetable capsules per bottle for a full 200-day supply. Quercetin is a plant pigment flavonoid that is naturally found in berries, broccoli, and leafy greens. Quercetin is a powerful antioxidant and free radical scavenger that helps protect the body from cell membrane damage & DNA alterations. *

FEEL THE DIFFERENCE: Quercetin is a powerful antioxidant. Quercetin supplementation may support immune and skin health, and cardiovascular health. Additionally, Quercetin helps fight allergies, supports circulation, supports mood & energy levels, and may help protect your kidneys, brain & liver. *

POWERFUL ANTIOXIDANT: Flavonoids such as Quercetin are free radical scavengers that fight off oxidation. Diets high in Quercetin may help combat cognitive impair & allergies. *

LIVER HEALTH SUPPORT: Milk thistle contains flavonoids called silymarin that have traditionally been used as support for liver health. Nature's Bounty Milk Thistle Dietary Supplements provide 250mg of Milk Thistle powder per capsule

HERBAL HEALTH: Nature's Bounty provides herbal products for a variety of health areas Nature's Bounty Milk Thistle is just part of the line of traditional supplements offered to support your health and your body

NATURE'S BOUNTY, BETTER OFF HEALTHY: Health-conscious people have trusted Nature’s Bounty products for decades Our dedication to quality, consistency, and scientific research has resulted in vitamins and nutritional supplements of unrivaled excellence

Quercetin the most abundant dietary flavonoid plant pigment naturally found in fruits and vegetables

Supports cardiovascular health

60 servings per bottle

T Cell Activator: Research shows Astragalus may activate T Cells to support immune system health

Healthy Aging Support Flavonoid; Astragalus is rich in Flavonoids and Polysaccharides to support immune system health

Manufactured in the USA, Non Gmo, Gluten Free: Double Wood's Astragalus Extract Capsules are Manufactured in the USA, Non Gmo, and Gluten Free

For Urinary Tract Health: Maintain a healthy urinary tract with CranCap, a convenient once-daily capsule made with powerful 36mg PACs from whole cranberry extract. Multiple scientific human studies show that 36mg of PAC is the optimal dose to promote & maintain urinary tract health. A natural solution to the pain, burning, urgency and hopelessness caused by UTIs, CranCap is here to help keep your urinary tract clean. 90 capsules.

Powered by Cranberries: PACs, or proanthocyanidins, are flavonoids found in North American cranberries. PACs have powerful antiadhesion benefits, working within your body to prevent UTI sources from sticking to cell walls within your urinary tract. Not all PACs are created equal! CranCap contains 36mg of PACs.

Stop UTIs Before They Start: In a 24-hour period, 1 CranCap Capsule has the same amount of PACs (and none of the sugar) found in 3-4 servings of cranberry juice. It also provides antioxidants for the maintenance of overall good health. CranCap’s residual effects can last up to 36 hours, but for maximum efficiency, take one capsule every 24 hours.

Supports Antioxidant Status: Quercetin is a phenolic antioxidant found in green leafy vegetables, onions, apples and cherries.

Cardiovascular Health: Quercetin supports cardiovascular health by supporting blood vessel endothelial cellular integrity and function.

Immune Health: Quercetin has been shown to be one of the most bioactive flavonoids that supports a healthy immune system response.

OUTSTANDING VALUE: Our Organic Milk Thistle contains 7500 mg strength per capsule AND 280 capsules per bottle – an amazing value! A single bottle contains up to a 9-month supply. Compare this to other leading brands that contain far few capsules, are not Certified USDA Organic, and do not provide a 7500 mg strength dosage. Our Organic Milk Thistle is a bargain not be found elsewhere!

30:1 EXTRACT FOR MAXIMUM STRENGTH DOSAGE: Our Organic Milk Thistle is made from a potent, concentrated 30:1 extract. A 30:1 extract means that the herb itself has been condensed, so that 30 grams of the original herb are concentrated into a single gram. By using a 30:1 extract, we have created a powerful supplement that is 30X stronger than standard Milk Thistle capsules.

USDA CERTIFIED ORGANIC: Our Organic Milk Thistle is derived from an all-natural, vegan, non-GMO source, and meets the strict organic standards of the USDA. While other competing products use various chemicals as fillers, binders, and excipients, our Organic Milk Thistle instead uses a unique blend of certified organic ingredients. One of these ingredients, Organic Acacia Powder, provides the added benefit of being a prebiotic, which feeds and encourages the growth of healthy probiotics.

Standardized elderberry extract

Powerful immune defense

Rich in proanthacyanidins

Yes, we are taking a loss at this amount. Take advantage while we gain traction. We have been strictly selling to clinicians and homeopaths for years and we now bring Research Labs High Absorption Quercsalis Quercetin w/ Bromelain to this marketplace.

WHY YOU NEED OUR FORMULA - Quercetin is absorbed very poorly by itself meaning you are flushing the very expensive ingredients down the drain. Our proprietary formula and manufacturing process of Quercsalis Quercetin w/ Bromelain significantly enhances the bioavailability or amount your body can use.

The histamines that are generated by cells in response to allergic and inflammatory reactions are decreased by the anti inflammatory effects of quercetin. Subsequently, assisting in reducing inflammation-related aches and discomfort.

Contains a combination of Quercetin, identity-preserved (IP) Vitamin C, Rose Hips, acerola, citrus Bioflavonoids, Hesperidin, rutin and pineapple bromelain in vegetable capsules

Antioxidant protection healthy immune function

90 vegetable capsules, 45 servings

NATURAL IMMUNE SYSTEM SUPPORT: Wiseceutical’s Organic Black Elderberry aids in shielding the body and naturally supports the immune system.

POTENT IMMUNE SUPPORTING INGREDIENTS: Elevate your immunity with Wiseceutical's Organic Elderberry Shield - packed with powerful, USDA organic certified ingredients. This potent supplement combines antioxidant-rich organic sambucus elderberry, immune-boosting natural Vitamin C from organic black currant, and the added strength of organic echinacea. With a powerhouse formula to support your immune system all year round.

RICH IN ANTIOXIDANTS: Containing high levels of flavonoids, our Organic Black Elderberry is rich in antioxidants that protect cells against damage caused by free radicals.

Powerful Immune Support - Several studies show Quercetin to play a powerful role in strengthening the immune system, especially after intense physical stress or exercise. Quercetin has been shown to help provide relief by supporting cells functions. Combined with Bromelain, this supplement helps strengthen the immune system and helps manage symptoms associated with seasonal changes.

The Master Flavonoid - Are you looking for superior immune support by one of the most well researched plant-based antioxidants? Our supplement features a high dose of Quercetin 1000 mg and 200 mg of Bromelain to maximize absorption and potency. Together they work synergistically to provide substantial improvements in antioxidant production. Quercetin has also been shown to support overall health.

Health Support - As we age, our body becomes more susceptible to various issues. Quercetin has been shown to provide Health support by improving vessel and flow throughout the body. Quercetin has also been shown to increase AMPK activation which provides a long list of benefits including reduced fat storage.

EFFECTIVELY RELIEVE VARIOUS TINNITUS SYMPTOMS.

CALMS YOUR NERVOUS SYSTEM.

IMPROVE YOUR MEMORY AND CONCENTRATION.

One 75 count bottle of Nature's Bounty Ginseng Complex Capsules

These Ginseng supplement capsules contain naturally occurring ginsenosides and flavonoids, and also contain Royal Jelly Concentrate

Ginseng extract blend provides Panax Ginseng Extract which helps to support vitality and immune function (1)

PROVIDES ANTIOXIDANT SUPPORT(1): Nature’s Bounty Turmeric Plus Black Pepper Extract contains active ingredient Curcumin as well as beneficial flavonoids called Curcuminoids, which act as antioxidants that help to fight free radicals in the body(1)

LONG HISTORY OF TRADITIONAL USE: In addition to its antioxidant properties, Turmeric has been traditionally used for centuries in India.

95% CURCUMINOIDS: Nature’s Bounty Turmeric Plus Black Pepper Extract uses Turmeric Extract standardized for 95% Curcuminoids. This is a gold standard in the industry and guarantees consistency in our formula

SOURCE OF ANTIOXIDANT: Our blend of Trans-Resveratrol, organic Green Tea, Quercetin, Grape Seed, and Acai Fruit Extract delivers anti-oxidants in every capsule. This antioxidant supplement helps to stop free radical damage and supports joint, healthy aging, heart, and vascular health. Resveratrol is an immune system enhancer that can help increase your energy and endurance.

ADVANTAGES OF Resveratrol: Resveratrol is a compound found in the skin of red grape seeds, juices, dates, berries, and red wine, with antioxidant properties that help to safeguard the heart and circulatory system, lowering cholesterol, and keeps you safe against clots which can cause heart attacks.

GOODNESS OF INGREDIENTS: Our ingredients come from sources rich in polyphenols -- Trans-Resveratrol from the PolygonumCuspidatum( Japanese Knotweed ) Root Extract, Green Tea Leaf Extract and Grape sed Extract full of potent polyphenols, Quercetin flavonoids from organic Sophora Japonica, and Acai Fruit Extract.

SUPPORTS CIRCULATION– Antioxidant flavonoids and other nutrients within hawthorn berries may help promote blood flow and support circulation.

ANTIOXIDANT-Free radical fighting antioxidant support.

DOSAGE-As a dietary supplement, take one capsule two times per day with food and water.

HIGH QUALITY SILYMARIN CONTENT: FarmHaven has formulated highly potent Milk Thistle (silybum marianum) capsules containing extract that is standardized to 80% Silymarin flavonoids, the “good stuff” in Milk Thistle. This means each capsule contains 300mg of pure Silymarin.

SUPPORTS HEALTHY LIVER FUNCTION*: The Silymarin found in Milk Thistle provides a natural way to support healthy liver function.* Silymarin helps support cell health and function and promotes a healthy inflammatory response.*

POTENT 30:1 CONCENTRATION: FarmHaven’s seed extract content means you’re choosing a high strength and high purity product that’s also good for the earth. Our Milk Thistle pills contain a 30:1 concentrate extract so each capsule actually delivers the equivalent of 11,250mg raw Milk Thistle seed for improved bioavailability and absorption.*

Maximum Strength Olive Leaf Capsules 750mg Per Serving, Made with Olive Leaf Extract, 200 Capsules, Non-GMO and Made in USA.

Rich in Natural Flavonoids and Polyphenols.

Supports Energy, Heart and Blood Health.

✔️ Great Source of Antioxidants - Quercetin dihydrate powder, or Quercetin 1000mg, makes for a great daily supplement for those looking to support their overall health and wellness!* Enjoy the antioxidant benefits that are found from grapes, berries, and fruits packed into our powerful pure quercetin powder. Boost your health with this powerhouse of antioxidants in just one dose.*

✔️ Boost your Immune System! - Supplementing with our Quercetin dihydrate powder may help support a strong and healthy immune system, giving you the ability to face any challenge.* With the benefits of this antioxidants supplement, you can rest easy knowing you're doing something good for your body. Make our Quercetin supplement, or Quercetin 1000mg, a part of your daily regimen and routine for a natural health boost!

✔️ Free of Gluten & Fillers - Quercetin Dihydrate has many benefits to our body, as well as a source of antioxidants. Our Quercetin powder, or Quercetin supplements, is perfect for anyone looking to quickly and easily increase their daily intake of antioxidants. With no added fillers, additives, or artificial flavors, this immune support supplement is sure to give you the boost your body needs!