Best Flavonoid Antioxidant Supplements for Antioxidant Support (2026)
We ranked products by ingredient potency, formulation type (phytosome/enhancers), transparency of label dosages, and price-per-serving value
The Verdict
- Best Overall: Quercetin with bromelain, vitamin C and zinc - 1215mg per serving — Best for combined support: high per‑serving quercetin plus bromelain, vitamin C and zinc for multi-pathway antioxidant and immune support
- Best Value: Quercetin 500mg with Bromelain | Bioactive Phytosome Complex — Best bromelain pairing: quercetin with bromelain in a bioactive phytosome complex for absorption and anti-inflammatory support
This roundup covers flavonoid-based antioxidant supplements focused on quercetin, hesperidin, diosmin and complementary botanicals for antioxidant and immune support. Selections were chosen for ingredient potency, formulation type (phytosome, bromelain pairing, or combined bioflavonoids), and overall value from label dosages and brand transparency
Top Picks
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1
Best Overall Quercetin with bromelain, vitamin C and zinc - 1215mg per serving
Best for combined support: high per‑serving quercetin plus bromelain, vitamin C and zinc for multi-pathway antioxidant and immune support
Quercetin phytosome capsules with ginger, bromelain, zinc picolinate and vitamin C from organic sources. Supports immune health and antioxidant activity, with positive feedback on whole-food ingredients and ease of swallowing
- quercetin phytosome 500mg
- bromelain 200mg
- zinc picolinate 15mg
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2
Quercetin 1000mg vegan capsules (pack of 2) - Doctor Recommended Supplements
Best vegan option: concentrated quercetin in high-dose vegan capsules that suit plant-based routines
Quercetin 1000mg per serving in vegan capsules. Supports immune system and inflammation response. Customers note ease of swallowing and good value
- 1000 mg per serving
- vegan capsule format
- pack of 2
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3
Quercetin 250 mg with QuerceFIT (no bromelain & zinc) - 60 capsules
Best phytosome-only formula: focused quercetin phytosome delivery for users prioritizing enhanced absorption without bromelain or zinc
Quercetin 250 mg supplement with QuerceFIT for enhanced absorption. Supports immune response and may ease allergy symptoms; valued for high-quality ingredients and easy swallowing, with no bromelain or zinc
- phytosome-enhanced absorption
- Sophora japonica-derived quercetin
- no bromelain or zinc
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4
Best Value Quercetin 500mg with Bromelain | Bioactive Phytosome Complex
Best bromelain pairing: quercetin with bromelain in a bioactive phytosome complex for absorption and anti-inflammatory support
Quercetin 500mg capsules enhanced with phospholipid binding for improved absorption. Supports seasonal allergies and immune health with all-natural ingredients. Customer notes include effective absorption and some stomach sensitivity for a subset of users
- 20x higher absorption vs regular quercetin
- phospholipid-bound bioavailability
- bioactive phytosome complex
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5
Diosmin 500 with Horse Chestnut, Butcher's Broom & Hesperidin - Dietary Supplement
Best multi-flavonoid blend: diosmin with hesperidin plus horse chestnut and butcher's broom for venous and flavonoid-focused support
Dietary supplement with natural botanicals like diosmin, hesperidin, horse chestnut, red grape and butcher's broom. Supports general wellness and circulation; customers note effectiveness and quality
- combination of diosmin and hesperidin
- includes horse chestnut and butcher's broom
- plant-based antioxidants