MuscleTech Platinum 100% Glutamine 250g

Single-ingredient supplements live or die on purity, because there is nothing else in the tub to hide behind. MuscleTech publishes how it verifies this one rather than asking you to take the label on trust.

Every scoop is 5g of pharmaceutical-grade L-glutamine, tested by HPLC - the analytical method that measures what is genuinely in the powder rather than what was intended. No fillers, no bulking agents, no other ingredients at all. Glutamine is the amino acid your body draws down hardest under heavy training, and replacing it after a session supports the repair work that happens once you leave the gym.

The 300G tub holds 60 servings, two months at a scoop a day.

It is unflavoured, so it stacks into a post-workout shake without adding a second taste to manage.