The functions of vitamins are clarified meticulously in this post. Vitamins are a collection of compounds necessary for appropriate cell activity, growth, and progression. There are thirteen important vitamins which are indispensable for the system to function effectively. They include Vitamin A, Vitamin C, Vitamin D, Vitamin E, Vitamin K, Vitamin B1 aka thiamine, Vitamin B2 aka riboflavin, Vitamin B3 aka niacin, Vitamin B6 aka pyridoxine, Vitamin B12 aka cyanocobalamin, Pantothenic acid aka B5, Biotin aka B7, and Folate aka folic acid or B9. There are two different types of vitamins; they are fat-soluble and water-soluble vitamins. Please click for more.