Glutamic Acid

Other name(s):

a-aminoglutaric acid

Reported uses

Glutamic acid is often used to treat hypochlorhydria and achlorhydria.

Unsubstantiated claims

Please note that this section reports on claims that have not yet been substantiated through studies.

Glutamic acid may treat personality and childhood behavioral issues. It may also aid in epilepsy and muscular dystrophy. It may also treat intellectual disorders.

Glutamic acid may be used to treat low blood sugar (hypoglycemia) in people with diabetes.

Recommended intake

Amino acids (AAs) are available as individual AAs or in AA combinations. They also come as part of multi-vitamins, proteins, and food supplements. The forms include tablets, fluids, and powders.

Note that by eating enough protein in your diet, you get all of the amino acids you need.

For adults with hypochlorhydria or achlorhydria, the recommended dosage is 500–1000 mg per day. You should take it before meals or food. 

There are no conditions that increase the nutritional needs for glutamic acid.

Side effects, toxicity, and interactions

Using a single amino acid supplement may lead to negative nitrogen balance. This can decrease how efficient your metabolism is. It can also make your kidneys work harder. In children, taking single amino acid supplements may also cause growth problems.

You should not take high doses of individual amino acids for long periods of time.

Women who are pregnant or breastfeeding shouldn’t use glutamic acid supplements.

People with maple syrup urine disease (MSUD) or cystinuria shouldn’t use glutamic acid supplements.

If you take too much glutamic acid, you may get systemic acidosis.