Flavonoids are one of nature’s many therapeutic gifts. Widely found in fruits and vegetables, these phenolic substances have antioxidant properties that protect cells from free radical damage. One of the most well-known and studied flavonoids is quercetin, a flavonol mostly found in onions, berries, citrus fruits, broccoli, and grapes. A potent antioxidant, quercetin boasts anti-inflammatory, anti-hypertensive,…