Vitamins have two classifications: water-soluble and fat-soluble.
Water-Soluble Vitamins: do not store in your body and need to be taken daily. B1 (Thiamine) B2 (Riboflavin) B3 (Niacin) B6 (Pyriodoxine) B12 (Cyanocobalamin) Vitamin C (Ascorbic Acid) Folic Acid
Fat-Soluble Vitamins: do store in your body and do not need to be taken daily. These vitamins dissolve in fat and remain in the body for long periods of time. Vitamin A Vitamin D (Calciferol) Vitamin E (Tocopherol) Vitamin K (Menadione)