Glutamine is one of the 20 amino acids encoded by the standard genetic code. That means, you are predisposed to it, from inception.  It is in fact one of the building blocks of human life.  Like many other amino acids, L-glutamine is biochemically important as a constituent of proteins.

Glutamine is POSSIBLY SAFE for most adults and children when taken by mouth, but the potential side effects of glutamine are not known.

Adults should avoid using more than 40 grams of glutamine daily. Children, age 3 to 18, should not be given doses that are larger than 0.65 grams per kg of weight per day. Not enough is known about the safety of higher doses in children.

Special Precautions & Warnings

Pregnancy and breast-feeding: Not enough is known about the use of glutamine during pregnancy and breast-feeding. Stay on the safe side and avoid use.

Severe liver disease with difficulty thinking or confusion (hepatic encephalopathy): Glutamine could make this condition worse. Do not use it.

Monosodium glutamate (MSG) sensitivity (also known as “Chinese restaurant syndrome”): If you are sensitive to MSG, you might also be sensitive to glutamine, because the body converts glutamine to glutamate. Do not use it.

Mania, a mental disorder: Glutamine might cause some mental changes in people with mania. Avoid use.

Seizures: There is some concern that glutamine might increase the likelihood of seizures in some people. Avoid use.