Vitamin Groups

"Vitamins are organic compounds that are traditionally assigned to two groups: fat-soluble, or hydrophobic, and water-soluble, or hydrophilic. This classification determines where they act in the body. Water-soluble vitamins act in the cytosol of cells or in extracellular fluids such as blood; fat-soluble vitamins are largely responsible for protecting cell membranes from free radical damage. The body can synthesize some vitamins, but others must be obtained from the diet."