The best replacement for glutamine is creatine.

The best alternatives to glutamine are rated as following:
★★★★★  creatine
★★★★  l-glutamine
★★★★  bcaa
★★★  glutamic acid
★★★  glutamate
★★  glutathione
★★  glucosamine
★  arginine
★  beta alanine
★  amino acids
★  leucine
★  whey protein
★  creatine monohydrate
★  gluten
★  casein
★  glutamax
★  hmb
  glutamine peptides
  bcaa supplements
  amino
  amino acid
  gaba
  peptides

Your alternative for glutamine is not listed? Suggest!
Speaking about glutamine, one probably shouldn't forget about protein.

Other search terms related to glutamine and their ratings are:
★★★★★ protein
★★★★★ bcaa
★★★★ creatine
★★ arginine
★★ whey protein
★ zma
★ casein
★ no2
★ whey
nitric oxide
You have in mind a companion for glutamine and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of glutamine in all years. Click on graph for more.
glutamine
creatine
l-glutamine