Best Flavonoid Supplements for Immune Support of 2025

Nature's Answer Flavonoids is a powerful supplement that supports a healthy immune system and is packed with antioxidants. With a total herbal equivalent of 15,000 mg per serving, it provides the nutrients your body needs for optimal immune function. The bioflavonoids and rose hips in this formula work together to enhance the immune system's response to harmful pathogens and protect against oxidative stress. By taking Nature's Answer Flavonoids daily, you can give your immune system the support it needs to stay strong and healthy. Plus, it comes in a great-tasting organic alcohol formula, making it easy and enjoyable to incorporate into your daily routine.

Pure Quercetin Capsules are a flavonoid vitamin supplement designed to support your immune, cellular, and cardiometabolic health. With bioflavonoids, this supplement can help you maintain healthy mast cell function, promote cardiovascular health, and support the health of capillaries by enhancing their strength and integrity. Additionally, Quercetin has been shown to be one of the most bioactive flavonoids, and research suggests it can play a supportive role in cellular, immune, and cardiometabolic health. Pure Encapsulations is committed to quality, using only premium ingredients sourced from trusted suppliers, and their products are free from wheat, eggs, tree nuts & peanuts, gluten, artificial colors, flavors & sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers & preservatives.

DEAL Quercetin Capsules are a natural plant-derived supplement that can provide year-round protection for your body. With a maximum strength of 1000mg per serving, these capsules are made with the most efficiently absorbed dihydrate form. This form retains activated flavonoid properties for advanced support and is derived from an authentic sophora japonica source. Taking quercetin will add natural phytonutrient properties that offer powerful antioxidant benefits. With only 2 capsules per serving, you can receive 1,000mg of top-grade quercetin. Every bottle contains over a 2-month supply and offers 150 total capsules. This product is non-GMO, gluten-free, and has been third-party lab tested to ensure quality. DEAL Quercetin Capsules are perfect for those looking for a potent allergy pill or to support a healthy immune system.

Naturebell Quercetin 1000mg is a powerful and natural antioxidant nutritional supplement that offers daily immune system health support. It contains activated quercetin that retains a 95% purity level with every serving, and is in the highest bioavailable form known as quercetin dihydrate. It is a natural herbal ingredient that is necessary for both mens and womens health, and provides important active properties like flavonoids to help support immune defense, heart health, sugar glucose maintenance, and overall longevity. Customers have reported positive results in preventing the common cold and flu, and have found relief from congestion, sore throat, cough, body ache, and fatigue.

SUPPLEMENTS STUDIO Quercetin Complex is a high-potency natural formula that provides immunity and respiratory support. The unique formula contains Quercetin 500mg, Organic Whole Food Quercetin Blend, Zinc Picolinate, Bromelain from Pineapple, Organic Ginger Root, Vitamin C from Organic Acerola Cherries, and Citrus Bioflavonoids from Organic Orange & Lemon. The whole food bromelain with quercetin complex has powerful antioxidant properties, which may help improve daily immune system function and even aid with digestion. The vegan formula may help promote respiratory health, enhance cognitive function, and give your immune system the boost it needs. With a 3 month supply, 90 servings bottle, and free from GMO, alcohol, preservatives, soy, gelatin, dairy, sugar, gluten, shellfish, nuts, wheat, stearates, silicon dioxide, fillers, and artificial ingredients, SUPPLEMENTS STUDIO Quercetin Complex is a pure, transparent, quality, and plant-based supplement.

Metagenics Quercetin 500 is a powerful supplement that provides 500 mg of quercetin per serving, which may enhance your heart health and support overall antioxidant levels. By incorporating this supplement into your daily routine, you can promote a healthy immune response, helping your body fend off illnesses. Additionally, it may assist in maintaining normal blood pressure levels, contributing to your cardiovascular wellness. With its non-GMO, gluten-free, and vegetarian formulation, this product is designed to fit seamlessly into your lifestyle while supporting your health goals.

The PAYAOCZ Quercetin Gummies are a delicious way to support your health. Each serving contains 1000mg of quercetin, a powerful antioxidant that promotes immune function, heart health, and cognitive performance. If allergies are holding you back, the combination of bromelain and quercetin can help your body adjust to environmental changes, potentially easing your discomfort. Additionally, these gummies are packed with essential nutrients like elderberry, Vitamin C, D3, K2, and zinc, providing comprehensive support for your daily wellness. With their tasty blueberry flavor and vegan, sugar-free formula, taking your vitamins has never been easier.

The Seeking Health HistaminX supplement is designed to promote healthy swelling responses and support your respiratory health. With bromelain, it helps manage swelling and supports lung function, making it easier for you to breathe comfortably. The inclusion of flavonoids boosts your immune system by enhancing antioxidant activity, which can be beneficial during allergy seasons. This supplement also supports healthy processes in your lungs, nose, and airways, providing comprehensive respiratory support. Plus, it is allergen-friendly, free from common allergens like gluten and nuts, ensuring safety for various dietary needs.

Global Healing Quercetin is designed to support your immune system and respiratory health. Its unique QuerceFIT formula enhances absorption, allowing your body to respond quickly to allergens and histamines. This powerful antioxidant helps alleviate occasional allergy symptoms like itching and runny nose, promoting natural respiratory comfort. Additionally, it nourishes your immune cells, protecting them from oxidative stress and bolstering your body's defenses against environmental threats. Finally, the flavonoids in Quercetin support healthy blood circulation, contributing to overall cardiovascular wellness.

Klaire Labs Bioflavonoid Complex is a flavonoid vitamin supplement that supports immune, cardiovascular and antioxidant health. The supplement contains a balanced mix of bioflavonoids, including rutin and quercetin, designed to maintain healthy blood vessels. It is free from common allergens and artificial ingredients. Developed with physicians, this supplement is intended to be used as directed by a healthcare practitioner.