Vitamins are divided into fat-soluble vitamins and water-soluble vitamins, depending on how they are absorbed. Fat-soluble vitamins A, D, E and K, require the presence of fat carriers to be absorbed while vitamins C, B and bioflavonoids are easier to assimilate because they dissolve in water. Since excess water soluble vitamins are eliminated through urine, they need to be replenished more often than fat-soluble vitamins.
Vitamins play an important role in growth and development, metabolism, immunity and digestion. Eating a varied, balanced diet will help you meet your vitamin requirements. If you can't meet your body's needs through food alone, supplements may be a good choice. Multivitamin and mineral formulas make it easy to ensure that you are getting an adequate supply of essential nutrients, in one easy to take supplement.