Usn nutrition pure glutamine provides you with a pure free form anti catabolic amino acid to support muscle and prevent muscles from being broken downr usn nutrition pure glutamine delivers 25g l glutamine per serving which has been shown to provide numerous performance enhancing benefits making this an effective sports supplement ideal for the average gym goer and should be an essential part of any athletersquos dietr usnrsquos pure glutamine powder is unflavoured making it suitable