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What is it?

Glutamine is an amino acid, specifically a blend known as branched-chain amino acids (BCCA).

Does it occur naturally in the body?


What are the claims?

During exercise, glutamine is depleted in the blood supply. Glutamine is involved in keeping the immune system healthy to fend off illness. It has been suggested that taking glutamine supplements can restore the glutamine depleted during exercise.

Does it work?

Taking glutamine supplements daily did not keep plasma glutamine levels constant.

However, athletes who were given glutamine supplementation before extreme physical events (marathons and triathlons) did keep their glutamine levels constant.

What are the dangers?

The current studies do not show any significant adverse health effects from taking glutamine.

The Bottom Line

During long-distance and high-intensity exercise, glutamine supplementation taken in conjunction with the exercise seems to be able to help keep glutamine levels constant. If you participate in marathons or triathlons, you might benefit from glutamine supplementation.

Glutamine does not appear to influence body composition when taken on a daily basis, not associated with long-distance and high-intensity exercise programs.

Unless prescribed by a doctor for a medical condition, we cannot recommend the supplement glutamine for people simply looking to build muscle.

Links for More Info

Centers for Disease Control and Prevention (CDC) Logo and Link
Centers for Disease Control and Prevention

United States Food and Drug Administration (FDA)

Herbs, Botanicals & Other Products - Extensive Information from the Memorial Sloan-Kettering Cancer Center

National Center for Complementary and Integrative Health - Overviews on Herbal Treatments and Supplements

National Institutes of Health

National Institutes of Health - Office of Dietary Supplements
National Institutes of Health - Office of Dietary Supplements

Operation Supplement Safety
Operation Supplement Safety

United States Department of Agriculture (USDA) Logo and Link
United States Department of Agriculture

WebMD Logo and Link
WebMD - Helping you make better decisions for life.

We at WeBeFit DO NOT recommend ANY supplements to ANY of our clients. ONLY a licensed Nutritionist or Medical Doctor can make those recommendations based on your individual needs.

This is being provided for INFORMATIONAL and EDUCATIONAL purposes only.

CAUTION: These supplements have not been evaluated by the Food and Drug Administration (FDA) for safety, effectiveness or purity. There may be unknown risks associated with taking any supplements. There are no regulated manufacturing standards for companies that make supplements. There have been instances where herbal or health supplements have been sold that were contaminated with toxic substances. If you should choose to purchase herbal or health supplements, please only purchase them from a reliable source to minimize the risk of contamination.

If you should decide to use ANY supplement, ALWAYS consult your doctor or Nutritionist first.