Vitamin C neutralizes free radicals in the body and protects tissues from oxidative stress. However, the needs are great and therefore it is necessary to take vitamin C frequently. Life Extension has added a flavonoid antioxidant, bio-quercetin, which acts as a vitamin C booster. Bio-quercetin prevents the oxidation of vitamin C. Thus, vitamin C maintains its concentration and is recycled in the body. The synergistic relationship between bio-quercetin and vitamin C enhances the effectiveness of both of these molecules in organs and tissues. Vitamin C with bio-quercetin with phytosome provides excellent efficacy and antioxidant protection.