A potent antioxidant, Vitamin C may be about the best immune support supplement you can take for your overall health. Perfect for year-round wellness support, Vitamin C helps support antioxidant activity and heart health Unlike many Vitamin C supplements, Solaray Super Bio Vitamin C 1000mg timed release formula is designed to release half the Vitamin C rapidly and the other half gradually throughout the day. This advanced technology may help extend the availability of Vitamin C to the body over a longer period. Additionally, this formula contains a buffering base of magnesium and calcium to make it gentler on the stomach, and includes a concentrated blend of bioflavonoids to help the body absorb and utilize the nutrients. Like all Solaray products, Super Bio Vitamin C is rigorously tested and lab verified for purity, potency and identity.