l-glutamine is one of the most highly underrated supplements in sports performance! this amino acid is versatile in function supportive of many health roles. perfect support for high intensity training supports muscle function immune & gut health can be added to foods & drinknature's best sport offers a world class range of premium uk made supplements.l-glutamine is required for muscle repair immune function & gut health. super versatile l-glutamine powder can be taken off the spoon mixed with drinks or sprinkled on food. glutamine is the most abundant amino acid in muscle tissue where it plays a vital role in metabolic processes. intense training depletes glutamine levels which explains why it has become such a popular & valued sports supplement.