Glutamine is the most abundant free-form amino acid in muscle, comprising over 50% of the free-form amino acids. During & after intense training, large amounts of glutamine are released from muscles. Supplementing with L-glutamine helps ensure that muscles are quickly refuelled which can help prevent muscle breakdown, & ultimately boost muscle growth. L-glutamine can be very helpful to the performance of both power & endurance athletes. Sci-MXs Glutamine PRO is the highest pharmaceutical grade available which ensures rapid absorption & maximum results.