Best Flavonoid Antioxidant Supplements (2026 Guide)
We ranked products by verified customer ratings and review volume, then filtered for formulation differences (dosage, enzymes, added vitamins/minerals) relevant to immune and circulatory uses
This roundup covers top-rated flavonoid antioxidant supplements focused on quercetin, diosmin and complementary enzymes chosen for immune and circulatory support. Selections are based on aggregated customer ratings, review volume and product formulations such as dosage per serving and presence or absence of bromelain or zinc, to help compare efficacy and ingredient priorities
Top Picks
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1
Quercetin with bromelain, vitamin C and zinc - 1215mg per serving
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
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
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
Arymar Diosmin Plus 500 - Circulatory support supplement
Diosmin-based circulatory support supplement with 500mg per tablet. May promote vein health and leg comfort. Customers note positive quality but mixed views on ingredient list
- high-dosage diosmin per tablet
- designed for circulatory health
- user-perceived quality
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5
Quercetin 500mg with Bromelain | Bioactive Phytosome Complex
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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6
Solaray Mega Quercetin with Bromelain, Vitamin C and Bioflavonoids
Antioxidant supplement featuring quercetin with bromelain, vitamin C and bioflavonoids to support immune function and heart health. Customers report improved allergy symptoms and respiratory health
- 600 mg quercetin per serving
- includes vitamin C and rutin
- customers report allergy relief
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7
Quercetin with bromelain, vitamin C, zinc & nettle
Quercetin supplement with a proprietary blend including bromelain, stinging nettle, vitamin C, D, and zinc. Supports immune system and helps with inflammation, per customer feedback
- quercetin 500mg
- bromelain included
- vitamin C and zinc combo
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8
Quercetin LipoMicel matrix softgels, 60 count
Quercetin supplement with lipomicel matrix for enhanced absorption. Supports immune and heart health; easy to take as a daily softgel. Customer note: effective for immune function and absorption
- lipomicel matrix for absorption
- supports immune function
- heart and capillary health support
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9
Quercetin with vitamin C and zinc - 6 month supply
Quercetin + vitamin C + zinc with bromelain for immune support. Easy to swallow and gentle on the stomach, with additional vitamin D3 noted by customers as value-added
- quercetin with bromelain
- includes vitamin C and zinc
- vegan, gluten-free, non-GMO
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10
Diosmin 500 with Horse Chestnut, Butcher's Broom & Hesperidin - Dietary Supplement
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