Thorne
Quercetin Phytosome
Bioavailable quercetin for a healthy immune and respiratory response.
Approximate price. Subject to merchant changes.
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- Serving size
- 2 capsules daily with food
- Goal
- immunity
- Category
- Daily Supplements
The review
Why we put this on the shelf.
Quercetin is the flavonoid in onions, capers, and apple skins that gives them their immune-modulating effects — but it's notoriously poorly absorbed. Thorne complexes it with sunflower phospholipids (Quercefit®) for 20× greater absorption.
We take this seasonally — early fall through spring — as part of an immune-support stack. Pairs naturally with vitamin C and zinc.
The formula uses a sunflower-derived phytosome (no soy), which matters if you're avoiding common allergens.
Pair it with
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