This product contains a non-acidic form of vitamin C (calcium ascorbate) and is fortified with natural biofl avonoids for maximum effectiveness.Mineral salts of ascorbic acid (mineral ascorbates) are buffered, and are therefore less acidic.This form of vitamin C is more suitable for people who experience gastro-intestinal problems or for those who wish to supplement larger doses of vitamin C. Available in pack sizes of: 30's and 60's. Suitable for: Vegan and vegetarian diets.