MuscleTech Platinum 100% Glutamine is HPLC-tested, pure glutamine, and one of the best options on the market. One bottle of this supplement contains a 60-day supply, and you’ll get 5g of glutamine per serving. Its formula will help your body control catabolism and help your muscles build the other amino acids they need to recover quickly. In addition, it will help you support increased cell volume, glycogen replenishment, and protein synthesis.