Best Powder Flavonoid Supplements of 2026

The Black Forest Cocoa Flavanols supplement offers a powerful dose of 1200mg per serving, combining 600mg of flavanols and 600mg of flavonoids to support your heart and overall health. These compounds work together to improve blood flow, which helps deliver oxygen and nutrients more efficiently throughout your body. The supplement is especially rich in epicatechin, a flavanol that boosts nitric oxide levels, promoting better circulation and energy. By choosing this product, you benefit from a carefully sourced and minimally processed cocoa powder designed to enhance your muscle function, cardiovascular health, and reduce inflammation and oxidative stress.

Clean Nutraceuticals Immune Blend is a comprehensive 18-in-1 immunity complex that comes in a 30-serving bottle, providing a 30 Day Supply to help boost your immune system. The rapid absorption formula ensures quick effectiveness without added sugars. With essential ingredients like vitamin C, vitamin D3, elderberry, and more, this blend offers powerful support all year round. Simplify your supplement routine with just one daily serving packed with antioxidants to aid your wellness journey.

The POWERED X High Flavanol Cocoa offers a powerful boost with 1500mg of cocoa flavanols per serving, helping you support healthy blood flow and protect your cells with antioxidants. It contains 700mg of epicatechin, which is known to enhance heart health and improve muscle performance by promoting better circulation and nutrient delivery throughout your body. This cocoa powder also supports brain function and overall vitality by fighting oxidative stress and improving oxygen use. Plus, it has a rich dark chocolate flavor that’s perfect for adding to smoothies, baking, or coffee, making it an enjoyable and nutritious addition to your daily routine.

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.

Sandhu's Quercetin 500mg is designed to support your immune and respiratory health throughout the year by providing a potent dose of quercetin dihydrate in each capsule. This supplement offers a highly pure form of quercetin, standardized to 95%, which means you get a stronger and more effective antioxidant compared to many other options. Each serving delivers 1000mg of this bioavailable nutrient, helping you maintain cellular health and ease oxidative stress. Rich in bioflavonoids, this formula supports your immune system naturally, making it a convenient choice for those looking to boost their overall wellness with a trusted supplement.

GADE NUTRITION BOOST YOUR HEALTH Quercetin Supplements are a potent combination of Quercetin, Bromelain, Vitamin C, D, and Zinc that work together to boost the immune system, support healthy aging, and promote normal respiratory function. With 1000mg of Quercetin per serving, these supplements are offered in veggie capsules to suit most diet preferences and are made with non-GMO, gluten-free, and vegan ingredients. The capsules are also free of sugar, stimulants, binders, filters, allergens, and chemical or synthetic substitutes. Manufactured in the USA in an FDA-registered laboratory that is GMP certified, these supplements are of high quality and purity.

aSquared Quercetin Supplement is a maximum strength formula that contains 500mg of Quercetin powder per capsule and 200 vegetable capsules per bottle for a full 200-day supply. Quercetin is a powerful antioxidant and free radical scavenger that helps protect the body from cell membrane damage & DNA alterations. 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. This vegan formula does NOT contain preservatives, soy, gluten, dairy or extraneous fillers. Made in the USA, in a GMP compliant facility, our products undergo rigorous testing to ensure quality & purity.

Designs for Health Fizzy Vitamin C Drink Powder is a vegan, high-potency vitamin C powder with bioflavonoids for immune and antioxidant support. The effervescent orange-flavored powder has potassium bicarbonate as a buffering agent and contains three unique bioflavonoids to work in synergy with vitamin C to keep collagen in good condition. It has no artificial sweeteners and is Non-GMO, Gluten-Free, Dairy-Free, and Soy-Free. Recommended by over 50,000 doctors, Designs for Health is the physician's choice for top quality professional strength supplements since 1989.

Protect your immune system and respiratory functions with JOYLI Quercetin Gummies. These organic gummies contain 500mg of quercetin, zinc, vitamin C, and vitamin D3, providing a first line of defense against environmental challenges. The super quercetin complex, enriched with zinc vitamins, activates cell protection for better respiratory and lung function. With year-round protection, these gummies assist with allergies, reduce oxidative stress, improve arterial functioning, and deliver vital antioxidants. JOYLI Quercetin Gummies are a delicious way to boost your daily antioxidant intake, ensuring that you feel your best year-round. Produced in the USA according to cGMP manufacturing compliance, you can trust in the quality of every gummy.

The Luma Nutrition Quercetin Supplement offers 500mg of high-quality quercetin combined with bromelain, a natural enzyme from pineapples. This blend helps you absorb nutrients better while minimizing digestive discomfort often caused by stronger quercetin doses. It acts as a powerful antioxidant to protect your skin and body from damage caused by free radicals, supporting long-term vitality. The supplement also boosts your immune system and promotes heart health, helping you maintain a healthy weight. Each bottle provides a month’s supply, making it easy to keep up your daily natural allergy support and save money with regular use.