Best Oil Flavonoids in 2026

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.

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.

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. *

Elderberry has traditionally been considered a medicinal plant. It can support a strong immune system and may even alleviate respiratory conditions such as cold and cough. High in flavonoids, elderberries are thought to reduce the risk of heart disease and are beneficial in lowering blood pressure and managing diabetes.

Organic elderberries can gently eliminate constipation and boost the gastrointestinal system for peak performance. Cook or steep dried elderberries to create a versatile elixir for jams, jellies, chutneys, pies, juices, wines, tinctures, syrups and sauces. Why use elderberry powder?

The sambucus plant is regarded for its ability to slow the aging process. It is thought to reduce the appearance of wrinkles and age spots, while promoting bone strength and new bone tissue development.

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

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

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.

GNC Vitamin C 1000 mg - Timed-Release If you’re looking for a convenient way to receive the benefits of immune support, you can add GNC Vitamin C 1,000 mg to your daily dietary supplement regimen. This protective antioxidant is essential for healthy bones, teeth, blood vessels and collagen. Plus, these vegetarian caplets also contain bioflavonoids and rose hips, all woven within a timed-release formula. Protective antioxidant vitamin provides immune support*

Dietary supplement contains 1,000mg of vitamin C, 25mg of citrus bioflavonoids complex 4:1 and rose hips powder per serving

Vitamin C with citrus extract flavonoids may have better absorption and retention in the body

PROVIDES 15+ SERVINGS OF FRUITS & VEGETABLES IN EVERY SCOOP!: Greens First is a complete phytonutrient and antioxidant supplement that works synergistically in your body providing 49 different super foods, extracts and concentrates including super-greens, organic fruits & vegetables, probiotics, soluble and insoluble fibers, herbs, spices, natural flavonoids and digestive enzymes.

FILL THE GAP BETWEEN WHAT YOU EAT & WHAT YOU SHOULD EAT: That's where Greens First can help! Greens First is the best tasting and Non-GMO complete phytonutrient and antioxidant supplement that works synergistically in your body so you can be sure you are getting phytonutrients, antioxidants, and more that your body needs every day!

GET THE BENEFIT OF POUNDS OF FRUITS, VEGETABLES & HERBS IN EVERY SCOOP: It's good to eat your fruits and vegetables, but drinking them is even better! When you stir Greens First powder into pure, cold water, it's not only delicious, refreshing and energizing, you are helping yourself to maintain a highly alkaline body, which is essential for optimum health and well-being.

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.

USDA Organic Spirulina Tablet from Spirulina Powder Organic (Arthrospira Platensis), 3000mg Per Serving, 720 Counts (4 Months Supply), Green Algae Super Food, Vegan Friendly, Filler Free, Irradiation Free, Easy to Swallow.

Loaded with Vegan Protein, Chlorophyll, Fiber, Amino Acids (Omega 3 6 9, GLA, Arginine), Fatty Acids, Immune Vitamins (Vitamin A, Vitamin B2, Vitamin B12, Vitamin C, Vitamin K, Biotin), Minerals (Magnesium, Calcium, Potassium & Zinc Vitamin), Flavonoids, Phytonutrients and Antioxidants.

Powerfully Supports Energy, Colon Health, Digestive Function and Immune System.

Micro Ingredients superior absorbing broken cell wall chlorella powder. A high concentrated natural superfood powder that uses pure vegan friendly ingredients and is created with raw, organic chlorella that is treated under low temperature only and non-irradiated for superior quality. Designed to retain almost all of chlorella’s full spectrum nutrient dense profile.

Extremely nutritious chlorella product that is rich in essential nutrients like complete vegan protein from chlorophyll, fiber, vitamin C & D, antioxidants, flavonoids, polyphenols, enzymes, GLA, and minerals. Working as on overall adaptogen for the entire body with benefits for immune support, natural energy, body odor control, digestion aid, colon health, and more!

If you are looking for healthy things to add to smoothies, then Micro Ingredients convenient plant based chlorella powder will do the job. Each bag contains 10oz of fresh chlorella powder that equals up to 76 servings. Take it in the morning, throughout the day, or before bed to enjoy one of the most nutritious healthy foods on the planet.

➕ Source of Antioxidants - Quercetin is found in grapes and berries, which are flavonoids that has antioxidant properties. Antioxidants are essential for overall health and wellness.* And, our Quercetin dihydrate powder, a quercetin supplement, to your daily routine for a daily dose of antioxidants!*

🟠 Boosts Immune Health - Quercetin, or Quercetin dihydrate, is one of the antioxidants available as supplements. Supplementing with our Quercetin Dihydrate powder or Quercetin powder, an antioxidants supplement, may help support and fortify the immune system, making it an ideal addition to anyone who leads a healthy lifestyle!*

✨ Pure, Vegan & Gluten Free - Our Quercetin dihydrate powder are pure and clean supplement, as well as it's gluten free, soy free, and dairy free. Add our Quercetin powder, one of our antioxidant supplements, in your diet and routine. Not only that it's pure, our supplement does no contain added sugars!

Milk Thistle contains a group of flavonoids collectively called silymarin

Traditionally used for liver health

Milk Thistle possesses antioxidant properties. Antioxidants help fight free radicals.(1) Free radicals can caue oxidative stress which may damage cells.(1)

One-a-day Health: With our potent 4:1 hawthorn berry extract, giving you the herbal equivalent of 2660mg of fresh berries, just one capsule a day will help deliver all the benefits of the Hawthorn Berry. As each of our bottles contains 120 capsules, one bottle will last you a full four months, far longer than typical hawthorne berry supplements!

Only The Berries: The most potent part of the Hawthorn plant are the fresh, blood red berries, which contain the highest concentrations of beneficial organic compounds. And that’s the only part we use! You won’t find any leaf, flower, or stem parts filling out this premium formula.

Antioxidant Properties: Hawthorne berries contain an amazing wealth of organic compounds that have been found to be powerful antioxidants including OPCs and flavonoids. These natural botanicals have a long tradition of use for their positive benefits. Our formula brings you a strengthened form of these compounds in one convenient capsule rather than a syrup, tincture, or hawthorn tea.

Whole Food Vitamin C; Purely-C provides the unique powers of natural-source vitamin C, plus flavonoids and buffered minerals, as found in nature; The only 100% food-source vitamin C plus flavonoid formula available

Healthy Immune Function; There is no synthetic vitamin C in Purely-C; Low-dose, whole food vitamin C is the chemical-free way to consume this immune-supporting complex

Full Ingredient List; Camu camu berries, acerola cherry, Rhus coriaria powder, rose hip powder; Free of all chemicals, pesticides & additives; Non-GMO

MULTIPURPOSE: Engineered with a no-clump formulation, our MCT oil powder mixes easily with water, coffee, tea, smoothies, and shakes. It's also delicious in raw dessert recipes!

ENERGY BOOST: MCT's are easily digested and provide you with sustained and natural energy throughout the day. A great source of fuel for your mind and body.

HEALTHY GUT: Enriched with premium acacia, our MCT oil powder is rich in flavonoids, which encourages a healthy gut barrier and helps soothe sensitive stomachs.

Sustainably US Grown, Organic Cranberry Concentrate Juice Powder, 8 Ounce, Wild Cranberry Powder Organic, Water Soluble and Cold Pressed, No GMOs and Vegan Friendly.

Rich in Immune Vitamins (Vitamin B2, Vitamin B12, Vitamin C and K), Amino Acids, Fibers, Minerals (Calcium, Magnesium, Potassium and Zinc Vitamin), Flavonoids, Polyphenols, Enzymes and Antioxidants.

Powerfully Supports Urinary Tract (UTI), Digestive Health and Healthy Immune Response, Pet Friendly.

HIGH POTENT RICH FORMULA: Our complex blend of trans-resveratrol, organic green tea extract, quercetin, grape seed extract, red wine extract, and acai fruit extract delivers anti-oxidants in every capsule. These trans resveratrol pills help to stop free radical damage and supports joint, and vascular health.

ACTIVE FORM 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. Resveratrol is an immune system enhancer that can help increase your energy and endurance.

A DIETARY SUPPLEMENT FOR DAILY LIFE: Our ingredients come from sources rich in polyphenols -- Trans-Resveratrol from the Polygonum Cuspidatum (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.

Advanced Immune Defense Supplement - Our 14 in 1 immune boost capsules includes artemsinin quercetin with bromelain and comes packed with all of the ingredients you need to feel your best! Our blend will not only improve your immune health, but will also aid in respiratory health, stress relief, mood support, and even skin health!*

The Immunity Support Stack You’ve Been Looking For - Don't settle for plain old capsules, powders, tablets, or gummies that just have one ingredient. With Clean Nutra, you get 5 full-dose products in one. Our product contains a full Artemesinin aka Sweet Wormwood, Quercetin 1000mg, Quinine, Mullein Leaf, and a complete four zinc blend with Zinc Citrate, Zinc Gluconate, Zinc Picolinate, and Zinc Biglycinate Chelate!

Introducing the Artemune100X Immune Blend - In addition to the 5 full supplements included above, our signature Arte-Mune blend contains these essential ingredients plus astralagus, ashwagandha root, nettle, bladderwrack, burdock, sea moss, monolaurin, bromelain, colostrum, and rutin! Our powerful formula offers 14 hand-selected ingredients that have been shown to improve your overall health in every way.

Blend of raw organic barley and alfalfa; gives you one of the widest spectrums of naturally occurring nutrients in a single source

Aid the body in detoxification and in the activation of self-healing; works to improve mental clarity, digestion and regularity, skin, hair and nails, and healthy cardiovascular support

USDA Certified Organic, Non GMO, Vegan, Gluten Free, Raw; no fillers or fiber, only pure juice

DAILY ORGANIC FRUITS AND VEGETABLES: A new federal health study by the CDC found that only 1 in 10 Americans consume the recommended amount of fruits and vegetables. Not only does Juce provide the nutrients of 1-2 servings of fruits and vegetables, but it’s also packed with amazing nutrient blends to detox, energize, revitalize, and cleanse; All without the cost or hassle of traditional juicing!

ANTIOXIDANT BLEND: Oxidative stress and free radicals can cause cell damage and disease. Antioxidants play a key role in defending cells and in supporting good health. Juce is packed with super fruits which are a powerful source of antioxidants to help boost energy, reverse the aging process, and nourish the skin.

ENERGY & FOCUS BLEND: The key to energy without the crash is NATURAL ENERGY. With powerful ingredients like beets and ginseng, Juce provides natural energy by promoting a better sleep/wake cycle and potentially increasing oxygen levels in the blood.

Powerful Flavonoids Supplements - Our hawthorn pills made from hawthorn berry powder contain significantly high naturally occurring levels of bioactive compounds like pectin and flavonoids

Rich Nutrient Profile - Hawthorn berries are packed with nourishing antioxidants proanthocyanidins and bioactive compounds including Quercetin Apigenin Myricetin Rutin Naringenin and Kaempferol

Heart Health Support - This remarkable berry has been used for centuries and now hawthorn supplements are a popular choice for adults looking to support their heart and digestion with antioxidants

➕ Packed with Antioxidants - Rutin contains several compounds called flavonoids which are antioxidant that's essential for overall wellness.* Our Rutin supplement is sourced from Sophora japonica flower buds. And, add our Rutin powder to any diet and routine for daily intake of antioxidants!*

✔️ For Overall Wellness - As a source of antioxidants, Rutin supplements are a great addition to your daily routine for overall wellness.* And, our Rutin supplements are perfect for people who are leading an active and healthy lifestyle, especially people always on the go!

✔️ Soy Free & No Filler - Our Rutin 500mg powder, or Rutin powder, is free of soy, dairy, and added sugars which is suitable for those who has dietary restrictions. Not only it's soy free, it also does not have any fillers, additives, and artificial flavors. And, take 500mg, which is about 1/5 tsp, for every serving of this herbal supplement.

[Vegan Collagen Booster w Biotin]: Unlike other collagen supplements, our Bamboo Silica complex includes Amino Acids to help rejuvenate skin’s youthfulness by restoring radiance, support skin structure & elasticity and improve texture. Stimulate skin health, hair growth and nail strength.

[90 Collagen Gummies - 45 Day Supply]: Purify Life adds 50% more hair skin and nails gummies than standard options to ensure you have the option of increasing your dosage, without running out in a week or two.

[Beauty Superfruits]: Grape Seed & Amla Fruit in our vegan collagen gummies for women, men, kids are loaded with antioxidants, phenolic acids, anthocyanins, flavonoids and vitamin c to boost your immune system, as well as protect against oxidative stress, tissue damage, and inflammation.

🛡【 Immune Support Gummies 】- Joyli Quercetin 500 MG supplement has potential benefits on the immune system and respiratory functions. These quercetin organic gummies provide you with a wide range of essentials, such as quercetin, zinc, vitamin C, vitamin D3, which create the first line of defense! Protect your body against most environmental challenges.

🛡【 Super Quercetin Complex 】- To offer you the maximum potency of quercetin & bromelain, we enriched our formula of quercetin with zinc vitamins for adults and kids! It may activate cell protection for better respiratory and lung function. In comparison with quercetin powder or quercetin capsules, our quercetin and zinc chewable are gentle on the stomach and highly absorbing!

🛡【 Year-Round Protection 】- Can you imagine your indoor and outdoor time with no discomfort? If you are tired of allergies, we got a perfect option for you! Quercetin with vitamin C and zinc supplements are shown to assist with allergies, allowing you to feel your best year-round! Stay free from seasonal symptoms, which affect your life quality.

SUPER BERRY - Aronia, or chokeberries, are an incredibly great source of antioxidants and flavonoids. Compared with other berry kinds the Aronia berry holds the highest ORAC value. No more worries, you chose the best. berry out there!

ANTIOXIDANT - The antioxidants and flavonoids made up of anthocyanins and proanthocyanidins, protect red- and white cell membrames from harmful free radicals in your body. Neutralizing these little devils makes your blood a lot healthier.

HEALTHY IS HAPPY - By giving your body a helping hand in cleaning up, it will repay you with more happiness. By preventing damage, you got more energy to get on top of your game. Just the way we love to see it!

CONTAINS ANTIOXIDANTS - flavonoids that give fruits and vegetables their bright colors

CONTAINS FLAVONOIDS - Flavonoids support capillary wall stability, healthy collagen development and balanced immune response

ANTIHISTAMINE SUPPORT - Antihistamine is shown to inhibit the release of histamines and other immune mediators

Gelatinized Peruvian Maca Root Powder Organic, 2 Pound (32 Ounce), Best Superfoods for Adding to Coffee, Tea and Drinks, No GMOs and Vegan Friendly

Source of Proteins, Natural Fiber, Vitamins (Vitamin C, Vitamin B2, Vitamin B12), Minerals ( Calcium, Iron, Potassium, Copper, Manganese), Fatty Acids and Flavonoids.

No GMOs, No Additives, No Preservatives, No Artificial Colors, No Flavors, No Soy, No Fillers and No Gluten.

Support Healthy Liver Function and Detoxification Processes: Defend XT provides key liver supporting nutrients, such as milk thistle, which support phase I and II detoxification pathways, including glucuronidation, sulfonation, methylation, and more.

Support Heart Health, Cholesterol, and Immunity: Defend XT is formulated with Bergavit 40 - a revolutionary patented extract of the Citrus bergamot fruit that provides an unmatched composition of heart-supporting flavonoids. Whether you’re a bodybuilder, elite athlete, dedicated gym-goer, or a fitness enthusiast, Defend XT will help maintain optimal cardiovascular function and heart health, thereby promoting performance and longevity.

Formula with Natural Ingredients in Clinical Doses: Reliable and evidence-based liver and heart supplements are seemingly nonexistent these days. Defend XT is changing that for the better with a formula that’s based on science and research from top universities across the globe. Defend XT features Bergavit 40, BioPerine, and milk thistle seed powder, in effective doses to ensure optimal efficacy and results.