L-Glutamine amino acid powder:

This is a pure L-Glutamine powder – the natural form of the amino acid glutamine and one of the ‘building blocks’ of protein. It is a nutrient that is integral to a number of important biological functions, including repair and maintenance of muscle tissue, bones, ligaments, the gut wall and the immune system.

A popular supplement with athletes, as well as those with overtaxed immune systems and digestive complaints.