Best Lemon Flavonoid Vitamin Supplements in 2026

Immune, muscle, teeth and bone health support supplement: contains one 100 count bottle of Nature Made Vitamin D3 2000 IU (50 mcg) Tablets for a 100-day supply

Nature Made Vitamin D 2000 IU tablets support bone health, teeth health, muscle health, and provide immune support

These Vitamin D 2000IU tablets help improve calcium absorption and contain 50mcg of Vitamin D 3, the body’s preferred form of Vitamin D

BALANCED IMMUNE SYSTEM: Quercetin is a naturally occurring free radical scavenger that supports healthy seasonal immune system function. Laboratory studies have demonstrated that quercetin can also help to promote normal respiratory function.

WITH BROMELAIN: Bromelain has a long history of use by herbalists and is known to help support a balanced immune system response to environmental challenges.

CLASSIFICATIONS/CERTIFICATIONS: Kosher, non-GMO, soy free, vegan/vegetarian, nut free, made without gluten, dairy free, egg free

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.

Zinc Picolinate is known to be of the best absorbed forms of zinc

Our high purity Quercetin Dihydrate is a powerful flavonoid that helps zinc shuttle into cells. It is known to be a Zinc Ionophore

Vitamin C and Bromelain help increase Quercetin absorption

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.

QuerceFIT Is The Most Activated Form of Quercetin - Phytosome technology is able to enhance quercetin absorption by more than 20x. Made of Sophora Japonica plant extracts to be the most bioavailable antioxidant flavonoid for rapid response to histamines.

Healthy Response To Histamines - Powerful antioxidant that supports your body's response to histamines & allergies, which helps ease and control occasional symptoms like itching, redness, runny nose, and excessive mucus for natural respiratory health.

Immune Support - Provides antioxidants to protect healthy immune cells from oxidative damage. Great potential to strengthen the immune system by promoting an effective response to harmful organisms to reduce the chances of feeling under the weather.

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. *

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

Supports cardiovascular health

60 servings per bottle

FIGHT OXIDATIVE STRESS – Vitamin C helps fight oxidizing free radicals, which is good for you from your head to your toes. Quercetin does too—the only problem is absorption.Our quercetin is wrapped in a phytosome, which makes it 50 times more bioavailable than traditional quercetin.

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

ENCOURAGE HEALTHY IMMUNE FUNCTION - Quercetin and vitamin C both promote immune health: in a randomized clinical trial, quercetin encouraged a healthy immune response in physically fit older adults—and we all know how much immune challenges want a taste of 1000 mg of vitamin C.

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.

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.

Immune Support: Essential-C and flavonoids help maintain a healthy immune system as well as healthy cell function.*

Highly Absorbable: Essential-C & flavonoids provides highly absorbable vitamin C and flavonoid compounds for synergistic antioxidant, immune and vascular integrity support.*

Antioxidant Support: Includes bioflavonoids, quercetin and rutin complement the role of vitamin C.*

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

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.

➕ 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!

All natural response to seasonal changes

Support during allergen exposure

NO artificial flavors, colors, excipients or stearates

Year Round Support: This ideal formulation combines 500 mg of quercetin, 50 mg of bromelain & 1,235 mg of vitamin C to help support healthy immune function and your body’s ability to cope during seasonal changes.

Perfect Pair: While bromelain is believed to help enhance the body’s ability to utilize quercetin, both may help enhance the antioxidant activity of the other.

Big Boost: Our formula is especially designed to help support healthy sinus and respiratory function, collagen synthesis, cardiovascular health, cartilage and bone development, and nerve impulse transmission

600mg Quercetin + 600mg Nettles - Two plant extracts that have been shown to support the immune system and the body’s natural inflammatory response upon exposure to environmental challenges.*

Quercetin is a flavonoid found in many foods that works to promote a healthy inflammatory response.*

Nettles have a high vitamin C content underlying its immune-supportive and antioxidant properties that may also benefit a normal inflammatory response.*

PREMIUM IMMUNE SUPPORT: Our organic elderberry gummies combines the health benefits of Black Elderberry Extract, Echinacea Extract, which can better strengthen body's natural defenses, boost immunity. These organic elderberry syrup are rich in antioxidants and high potency, which can provide you and your family with the protection you need.

STRENGTHEN ANTI-OXIDATION: One study has proved that organic black elderberry boosted anti-oxidation ​is three times faster than a regular herbal supplement. For optimal protection all year-round, you can chew 1- 2 sambucus elderberry gummies vitamins per day to help our body remain balanced and defend naturally.

MOST VALUABLE BIOACTIVES: EnvyCure vegan elderberry gummies are made from the European black elderberry extract to ensure you can get a higher content and all-natural flavonoids, which are the most valuable antioxidants and phytochemicals in elderberry. Each serving elderberry gummies contains 150mg of elderberry extract, which is standardized to 25% anthocyanin (potent flavonoid BioActives) to ensure you get better immunity compared with other elderberry supplements.

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

Sambucus elderberry gummies are made from European black elder (Sambucus nigra L.) has been traditionally used as a winter remedy for immune support.* Made with our unique, full spectrum black elderberry extract, ensuring Flavonoid BioActives content, which has been tested and shown to be active within the body.

Elderberry gummies are made from a unique cultivar of black elderberries with a higher level of naturally-occurring flavonoids; each serving delivers 50 mg of black elderberry extract, with vitamin C and Zinc.

Black elderberry extract is standardized to BioActives (flavonoids).

【Benifit of ECHINACEA】Echinacea, also known as purple coneflower, which is a very popular herb for centuries, people commonly take it as immune system booster. It can improve digestive & immune system health.

【Powerful Antioxidants 】Our organic echinacea & elderberry gummies is loaded with high concentration of Flavonoid which are potent BioActives to promote your immune defenses, maintain healthy digestive system. Added with the Vitamin C & Zinc as aid to help stimulate activity of immune system cell and improve skin health and chronic fatigue.

【100% Natural Supplement】The organic echinacea gummies for kids & adults are free of GMOs, preservatives, artificial colors, soy, eggs, nuts, gluten, gelatin. These are vegetarian and low sugar echinacea gummies, only uses all-natural ingredients.

Tri-Complex: One tablet contains 1000 milligrams lemon bioflavonoid and 100 ea. hesperidin and rutin

Antioxidant Support: Powerful free radical scavengers may help protect cells

More Bioflavonoid Benefits: Helps support vitamin C absorption and healthy blood flow

Quercetin with Bromelain – More potent than other Quercetin supplements, our Mega Quercetin includes 600 mg of Quercetin along with Vitamin C, Bromelain and Bioflavonoids.

Feel Well – This powerful formula combines antioxidant Vitamin C with bioflavonoids to create an immune support supplement that may also help support sinus relief.

The Smart Choice – Our Mega Quercetin is vegan and comes in easy-to-swallow VegCaps; just take one VegCap two times daily for immune system and sinus support.

Supports overall health and wellness**

Supports upper respiratory health**

Potent antioxidant support**

Natural Allergy And Sinus Support: Breathe-X is a natural allergy relief supplement that provides sinus support and helps soothe nasal passages. It also helps manage healthy tissues in the respiratory tract, while supporting immune function and providing antioxidants to assist in detoxification. Don’t let allergies control your everyday life, fight back with Breathe-X by LifeSeasons.

Clinically Tested Ingredients: Crafted with clinically tested ingredients, Breathe-X contains Quercetin, Bromelain, Vitamin C, Citrus Bioflavonoids, and Nettle. When you're struggling to breathe easily, your whole life can be miserable; these targeted ingredients help to support the respiratory system by soothing the tissues of the respiratory tract.

Effective: Take three capsules daily, with or without food. Many customers report feeling the effects of Breathe-X within 30 minutes of use. Greater results can be achieved when one takes this product for longer periods of time, specifically for 3-4 months. Talk to your healthcare provider about the serving size that is right for your body.

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.

Breathe easy with year-round defense for your seasonal allergies; Formulated with a fast-acting, highly bioavailable form of quercetin that’s easy to absorb

Support your immune system with this potent antioxidant; Protects against oxidative stress and free radicals; Enhances the efficacy of other nutrients like zinc and vitamin C

Supports a healthy inflammatory response as well as sinus and upper respiratory health; Also includes 50mg of vitamin C per serving for a boost in antioxidant protection