Glutamine in its simplest form, without any additives, is an ideal, an short term remedy which is possible to use almost at any training period. Glutamine increases anabolism, it is a kind of nitrogen donor, so that we observe a positive nitrogen balance, and it has anti-catabolic effect. All of these elements can be used while building lean muscle mass and reduce body fat. Glutamine is a compound that helps in re-synthesis of glycogen. This feature provides faster recovery after training and, with cyclical supplementation, increase of muscle strength. A common reason for limiting the progress of the training are breaks due to impairment of the immune system. The regular supplementation with glutamine can be a remedy also in this case – this an amino acid not only will help with the synthesis of immune cells, but also "feed" the intestinal cells and "build" beneficial bacterial flora.