Quest Buffered C 700mg is a buffered form of Vitamin C - suitable for those who cannot tolerate acidic supplements. It is a quick release tablet, designed to release full potency within 30 minutes and provide quick saturation of the tissues. It is also used as an antioxidant, to support circulatory and immune health. Vitamin C is required for the synthesis of collagen, the main structural component of skin and the stress hormone adrenaline.