Glutamine is the most abundant free form amino acid in muscle. Supplementing with l-glutamine helps to replenish glutamine levels for improved muscle repair; it offers many other benefits such as immune and digestive system support after physical stress. Mutant exclusively use only Japanese grade l-glutamine from fermented sources. It is micronised for higher solubility and uptake, and conforms to USP grade (United States Pharmacopeia) standards. Product Highlights 100% pure to ensure the best results possible. Japanese grade; fermented sources with no animal-derived ingredients. Micronised for the fastest uptake