Multi Packs contain nutrients, vitamins and minerals for serious bodybuilders and serious athletes. Exercise depletes a number of components that are not only necessary for a regular metabolism, but are also important for bodybuilders to get the results and recovery they strive for. Vigorous exercise requires a different set of nutrients such as vitamins, minerals, amino acids and fats to maintain a healthy body than those who do not put their bodies under such stress. It is important to ensure that your body has enough of these various ingredients to nourish the muscles and maintain the energy to see the desired body growth.