Quest Bio C Complex contains 50% bioflavonoids - plant pigments found in foods naturally rich in vitamin C. They increase vitamin C absortion. It is 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. Quest Bio C Complex is a quick release tablet, designed to release full potency within 30 minutes and provide quick saturation of the tissues. Suitable for vegetarians and vegans.