A few studies suggest that L-glutamine supplements may help IBS symptoms, but more research needs to be done. L-glutamine, or just glutamine, is an amino acid. Amino acids are molecules that form the ...

Some evidence suggests that L-tryptophan supplements may help to treat conditions such as anxiety and sleep disorders. However, more research into the safety and efficacy of L-tryptophan supplements ...

L-theanine is an amino acid. While more research is necessary, possible benefits include managing anxiety, relieving stress, and reducing insomnia. L-theanine is primarily found in green and black tea ...

L-citrulline is a substance called a non-essential amino acid. Your kidneys change L-citrulline into another amino acid called L-arginine and a chemical called nitric oxide. These compounds are ...

L-carnitine, also known as levocarnitine, is a naturally occurring amino acid structure that the body produces. It plays a critical role in energy production, converting fat into energy. Most people ...

Note: The U.S. Food and Drug Administration (FDA) does not approve supplements for safety or effectiveness. Talk to a healthcare professional about whether a supplement is the right fit for your ...