Click to expand Tap to zoom Bio-Quercetin (30 Capsules) by Life Extension Sale Original price $ 12.00 Current price $ 9.60 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Our Bio-Quercetin supplement uses a quercetin encased in a plant-derived phytosome, which makes absorption easier. Our quercetin is up to 50 times more bioavailable than a dose of standard quercetin. Non-GMO.