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Updated: 06 Apr 2026

10 Best Flavonoid Supplements Liquid

#1 Best Pick
Fisetin 500mg - Fisetin Supplement (Similar to Apigenin, Luteolin, Quercetin) Senolytic Activator - Sirtuin Activator - Bioflavonoid Polyphenols - Non-GMO, Vegan, Lactose Free, Soy Free - by HumanX

Fisetin 500mg - Fisetin Supplement (Similar to Apigenin, Luteolin, Quercetin) Senolytic Activator - Sirtuin Activator - Bioflavonoid Polyphenols - Non-GMO, Vegan, Lactose Free, Soy Free - by HumanX

Brand: HumanX
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  • FISETIN 500mg: Fisetin supports cellular protection from stress related damage, so cells function at full capacity. Fisetin helps the body produce glutathione, the most powerful antioxidant in the body.*
  • ANTI-AGING SUPPORT: Fisetin removes dysfunctional cells, called senescent cells, from the body. The build up of senescent cells in the body is one of the major contributors towards aging.*
  • BRAIN PROTECTION: Fisetin is a powerful anti inflammatory that supports protection and preservation of the brain from inflammation.*
  • 30 DAY REFUND GUARANTEE: If you aren't 100% satisfied, send it back for a FULL REFUND.
  • USA: Bottled and tested in a USA GMP certified facility under the highest regulatory standards.
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#2 Best Value
Black Walnut Wormwood Liquid Extract | 2 fl oz | Alcohol Free Tincture | Vegetarian, Non-GMO & Gluten Free | by Horbaach

Black Walnut Wormwood Liquid Extract | 2 fl oz | Alcohol Free Tincture | Vegetarian, Non-GMO & Gluten Free | by Horbaach

Brand: HorbΓ€ach
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  • ANTIOXIDANTS: Black Walnut and Wormwood contain naturally-occuring antioxidants for daily wellness*
  • POTENT EXTRACT: Horbaach's Alcohol-Free Liquid Extract is super concentrated for maximum support
  • FLORA-FRIENDLY: Helps support healthy intestinal flora balance in the body*
  • HORBAACH MANUFACTURERS: Laboratory Tested, Trusted Ingredients, Superior Quality, 100% Guaranteed!
  • NATURALLY FREE OF: Gluten, Wheat, Yeast, Milk, Lactose, Soy, Artificial Color & Flavoring & NON-GMO
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#3 Budget Pick
Swanson Premium Pycnogenol 50mg 50 Caps - Dietary Supplement

Swanson Premium Pycnogenol 50mg 50 Caps - Dietary Supplement

Brand: Swanson
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  • <p>50 mg per capsule of potent free-radical protection</p>
  • <p>Features procyanidins, catechins, taxifolins and a wide spectrum of phenolic acids</p>
  • <p>Derived from the bark of the French maritime pine tree</p>
  • Per GMP guidelines set forth by the FDA, most products are formulated for 24 months from the date of manufacture. Liquids and probiotics are formulated for 12 months.
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#4 Top Choice
Fisetin Double Strength - 200 mg Capsules, 60 Count Introductory Offer only (Natural Bioflavonoid Polyphenols Supplement Similar to Apigenin, Luteolin, and Quercetin) Anti-Aging Support Senolytic

Fisetin Double Strength - 200 mg Capsules, 60 Count Introductory Offer only (Natural Bioflavonoid Polyphenols Supplement Similar to Apigenin, Luteolin, and Quercetin) Anti-Aging Support Senolytic

Brand: Logic Nutra
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  • ANTI-AGING SUPPORT - Fisetin helps support healthy aging by promoting cell efficiency
  • NATURAL SENOLYTIC AGENT - Fisetin is classified as a "Senolyitc Agent" meaning it supports your body's ability to clear away damaged or potentially harmful cells
  • POWERFUL POLYPHENOL - Fisetin is a powerful polyphenol which supports organ health, brain health, mood, blood pressure, and circulation
  • PURE & HIGH QUALITY INGREDIENTS - Vegan, Non-Gmo and Gluten Free - Logic Nutra's Fisetin is Vegan, Non-Gmo, and Gluten Free
  • MADE IN THE USA - Manufactured at a GMP certified, organic certified and FDA inspected facility
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#5 Popular Choice
RENUE Liposomal Fisetin Senolytic Supplement 150 mg - Bioavailable Formula for Increased Absorption – 90 Capsules

RENUE Liposomal Fisetin Senolytic Supplement 150 mg - Bioavailable Formula for Increased Absorption – 90 Capsules

Brand: Renue By Science
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  • PREMIUM QUALITY: We use a potent 150mg dose of pure fisetin in each allergen-free capsule. Delivered in a liposomal format for optimal bioavailability. 90 capsules per bottle - a 3 month supply when taking the recommended serving size of 1 capsule daily.
  • POWERFUL SENOLYTIC SUPPLEMENT: Fisetin is known as "The King of Senolytics", helping your body clear out senescent "zombie" cells that trigger inflammation and impair cellular function as you age. Our liposomal delivery enhances absorption for maximum benefits.
  • PROMOTES HEALTHY AGING: LIPO Fisetin supports a clean and well-functioning internal environment by selectively targeting aging cells. It's a natural polyphenol and antioxidant found in strawberries, apples, and onions that can help reduce your risk of age-related diseases.
  • QUALITY ASSURED - LIPO Fisetin is allergen-free and manufactured in a GMP compliant, FDA registered facility, ensuring the highest quality standards for your well-being.
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#6 Top Pick
Eclectic Institute Quercetin Flavonoid Complex 3.2 Oz (90 G) Powder

Eclectic Institute Quercetin Flavonoid Complex 3.2 Oz (90 G) Powder

Brand: Eclectic Institute
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#7 Top Pick
Meadowsweet Alcohol-FREE Liquid Extract, Meadowsweet (Filipendula Ulmaria) Herb Glycerite Natural Herbal Supplement, Hawaii Pharm, USA 2 oz

Meadowsweet Alcohol-FREE Liquid Extract, Meadowsweet (Filipendula Ulmaria) Herb Glycerite Natural Herbal Supplement, Hawaii Pharm, USA 2 oz

Brand: Hawaii Pharm
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  • Highest Strength, Super concentrated Meadowsweet NON-Alcohol liquid extract!
  • Meadowsweet tincture contains ONLY natural ingredients!
  • High Quality Meadowsweet NON-Alcohol liquid extract- crude extract of first extraction! We meticulously produce our extracts according to precise standards where each herb is extracted according to the distinct characteristic of each plant!
  • Super concentrated Meadowsweet NON-Alcohol extract: dry material / menstruum ratio 1:3!
  • We strictly use only organic or ethically sourced wild harvested material, highest quality alcohol, vegetable glycerin and crystal clear water! Really the BEST Meadowsweet extract on market!
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#8 Top Pick
Pon Lee Brazil Green Bee Propolis Liquid Extract No Alcohol 30ML 1 Pack

Pon Lee Brazil Green Bee Propolis Liquid Extract No Alcohol 30ML 1 Pack

Brand: PONLEE
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  • PREMIUM INGREDIENT: Premium High-Quality Brazil Green Bee Propolis Extract for Best Online Price.
  • Known world-wide as ONE the best of Brazilian Green Propolis.
  • RICH IN FLAVONOIDS, PHENOLIC SUBSTANCES AND HIGH CONCENTRATION OF C ARTEPILLIN: Packaged in a drop bottle. Pon Lee products are produced WITH HIGH standards and guidelines of GMP ( Good Manufacturing Practices) by following strict hygiene and processing. Practices) by following strict hygiene and processing
  • NATURALLY RICH IN ANTIOXIDANTS :This is a natural solution that is painstakingly tested for quality & potency. No refined sugars, artificial ingredients, or additives. PON LEE products are always third party lab tested to ensure they never contain pesticide residue or nasty chemicals.
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#9 Top Pick
Nanofood Liposomal Quercetin Phytosome Liquid Drops Supplement, Vitamin E, Phospholipid, Vegan, Non-GMO, 3 Months Supply, 90 Servings

Nanofood Liposomal Quercetin Phytosome Liquid Drops Supplement, Vitamin E, Phospholipid, Vegan, Non-GMO, 3 Months Supply, 90 Servings

Brand: Codeage
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  • Liposomal Quercetin: Codeage Nanofood Liposomal Quercetin Phytosome features a proprietary quercetin blend and comes with a liposomal delivery in a delicious pineapple tangerine flavor. Quercetin is a flavonoid, a versatile plant and nutritional compound which may be sought after for its potential antioxidant properties.
  • Quercetin Phytosome: This Liposomal Quercetin Phytosome formula features quercetin phytosome derived from the flowers and buds of the sophora japonica tree, a high-quality plant-based powerhouse. Phytosomes are used for their specific propriety of delivering nutrients.
  • 90 Servings - 3 Months Supply: Nanofood Quercetin Phytosome liquid drops supplement also features vitamin E and comes with 3 months of supply in each bottle. Easy to drink or to mix in your favorite beverages with just 1 teaspoon of quercetin a day.
  • Liposomal Delivery: Liposomes are fat-soluble vehicles derived from lipids that intend to provide a different bioavailability and absorption. This phospholipid complex comes from non-GMO sunflower oil containing phosphatidylcholine.
  • Manufactured in the USA, Vegan & Non-GMO: Codeage Nanofood Quercetin liquid supplement is manufactured in a cGMP certified facility and Third-party tested.
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#10 Top Pick
GIVOL Organic ZINC Boost Mist 100mg (Extra Strength) Liquid Spray for Kids & Adults - Immune Boost - High Flavonoid Levels - Vegan- Easy Absorption - Non-GMO - 2 oz

GIVOL Organic ZINC Boost Mist 100mg (Extra Strength) Liquid Spray for Kids & Adults - Immune Boost - High Flavonoid Levels - Vegan- Easy Absorption - Non-GMO - 2 oz

Brand: GIVOL
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  • βœ… Suggested Use: 4 sprays daily between meals
  • βœ… Zinc Picolinate, Ascorbic Acid, Berry of SAMBUCUS NIGRA, Vegetable Glycerin, Mixed Berry Extract, Lemon Extract, Purified Water-ORGANIC - NON GMO- VEGAN - ANTIOXIDANT RICH.
  • βœ… Suitable for vegans. Contains no yeast, dairy, egg, gluten, wheat, sugar, starch, salt, preservatives, artificial color, flavor or fragrance.
  • βœ… We proudly make and bottle our product here in the United States, so you can rest easy knowing that you are getting the very best ingredients!
  • βœ… If you are not fully satisfied in any way, simply contact us and we will set things right. As a small family-owned company, we want all of our customers to feel taken care of !
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