Glutamine has a number of very positive properties both in terms of general health as well as physical exertion. The problem, however, is that the big amount of the normal form of glutamine is destroyed in the stomach, as well as "lost" during metabolism. One of the solutions, until the invention of NAG, was to increase the dose of L-glutamine,. It turns out that the process of acetylation creates a compound that easily penetrates the cell membrane and becomes more resistant to adverse environmental conditions. NAG is a guarantee of increased resistance, recovery and growth of muscle cells and anti-catabolic protection with minimal doses of the supplement.