Best Lemon Flavonoid Vitamin Supplements 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.

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.

Immune support supplement: contains one 150 count bottle of Nature Made Vitamin C 250 mg Gummies for a 75-day supply

These Vitamin C supplements help support the immune system and help neutralize free radicals in the body

Vitamin C is an antioxidant that helps support your immune system, increases Iron absorption, and is needed for Collagen synthesis to support overall skin health

✔️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. *

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!

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.

【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.

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

FUEL YOUR INNER ATHLETE - Muscle cells naturally contain high levels of carnosine. It’s a compound (made up of two amino acids) that acts as an antioxidant and a pH buffer, protecting your muscle cells from oxidative stress during AND after exercise. But as we age, ideal carnosine levels begin to decline. Adding carnosine to your daily routine may help protect your cells against oxidative stress

GLYCATION BE GONE - Carnosine helps inhibit glycation, a process by which excess sugar molecules bind to a protein or fat molecule. Over time, glycation affects your body’s essential proteins, and it can contribute to a variety of age-related factors, like wrinkled skin

MULTI-NUTRIENT BLEND - Are you ready to get maximum carnosine benefits? Our formula delivers 500 mg of carnosine, but we didn’t stop there. We added luteolin, a flavonoid found in fruits and veggies that helps safeguard DNA health. And to complement carnosine’s potent antioxidant properties, we added vitamin B1 (thiamine) and benfotiamine. Get the most out of this muscle-friendly nutrient—all in easy-to-swallow capsules

Supports Optimal Health; Citrus Bioflavonoids comprise a group of water-soluble plant pigments found in foods such as oranges & lemons; This formulation offers natural, citrus bioflavonoids to promote and support optimal health

Antioxidant; Citrus bioflavonoids possess antioxidant properties that help fight cell-damaging free radicals in the body

Gluten, Wheat & Dairy Free; Solgar Citrus Bioflavonoid Complex is non-GMO, vegan, kosher, and free of: gluten, wheat, dairy, soy, yeast, sugar, sodium, artificial flavor, sweetener, preservatives, and color

➕ 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.

WHAT ARE CITRUS BIOFLAVONOIDS: Citrus Bioflavonoids are comprised of a group of water-soluble plant pigments that are found in citrus foods like lemons and oranges and contribute to the colorful look of these food

ANTIOXIDANT: Citrus bioflavonoids possess antioxidant properties in order to help the body fight off cell-damaging free radicals

OPTIMAL HEALTH: The formulation of Solgar Citrus Bioflavonoids offers natural, citrus bioflavonoids in order to support optimal health

🛡【 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.

Quercetin with Bromelain Supplement: Per serving (2 gummies) contains 1000mg quercetin and 200mg bromelain. Both are derived from natural fruit extracts. Quercetin is a powerful antioxidant and present in many vegetables, and bromelain comes from the pineapple stem.

Health Benefits: Quercetin gummies support immune system health, support lungs and healthy breathing.

High Dose & High Potency: The dose of quercetin is 500 to 1,000 mg per day, suitable for both adults and children. Bromelain helps increase the bioavailability and positive benefits of the flavonoid quercetin.

✅ High concentration: one tablet contains 200 mg of pure Quercetin, 250 mg of Vitamin C, 25 mg of Bromelain, 25 mg of Acerola, 25 mg of Rosehip, 5 mg of Rutin and 2.5 mg of Bioflavonoids

💪 Our natural Quercetin supplement performs antioxidant function and supports your immune system

😉 Dulàc Nutrition's Quercetin, Vitamin C and Bromelain tablets are natural and easy to swallow. We recommend to take 1 tablet a day, away from meals

(2 MONTH SUPPLY | 120 GUMMIES) - Maximum Strength 1000mg Blend of Quercetin with Zinc, Vitamin C and Elderberry Supplement Extract for Adults and Kids

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.*

ZINC QUERCETIN SUPPLEMENT - Quercetin 1000mg + Zinc, 500mg per chewable gummy, is packed with double the dosage of our competitors and Zink Vit C Powder, our Qucertin will provide daily antioxidants, immune defense, and acts as an anti-inflammatory immunity system booster all throughout the day.