Formulated with PUREWAY-C, a researched form of Vitamin C. Provides a rapid & high absorption form of Vitamin C equivalent to 1000mg of Vitamin C. Supports healthy immune system function. Nutra-Life Rapid-C 1000mg are formulated with PUREWAY-C, a researched form of Vitamin C that is rapidly absorbed & has higher absorption by the body compared to calcium ascorbate. This formula supports immune system health. PUREWAY-C is a registered trade mark of One Innovation Labs, LLC.