½ teaspoon/day (up to 1 teaspoon for reducing appetite and cravings).
Possible benefits: Elimination or reduction of cravings for sugar; alcohol and tobacco (even drugs): rebuilding and repairing the gut lining; improving digestive tract health; healing ulcers; improving metabolism, cellular detoxification, stabilizes blood sugar/glucose levels and diabetes; promoting muscle growth and helping fat burning; memory loss, focus, and concentration; improving IBS and diarrhoea by balancing mucus production resulting in healthy bowel movements; athletic performance and endurance exercise recovery; sustaining energy and reducing fatigue; prevention of muscle wasting; shortening the length of the infection and improves immunity.
The Longer Story: The body uses a lot of this essential amino acid and 60% of skeletal muscle is made upon glutamine. Our most important antioxidant (glutathione) is made by the liver, keeps the liver healthy, and is vital for neutralising free radicals that cause damage and disease.
Unfortunately increased cortisol release (as a result of stress) is guaranteed to deplete glutamine, and 1 of the 3 building blocks for glutathione happens to be glutamine.