Your body needs arginine, more commonly known as L-arginine in supplement form, to carry out several important functions. It’s an amino acid that helps build proteins. It’s especially important for ...

L-methylfolate is a form of folate, or vitamin B9, that can help regulate serotonin and dopamine levels. Because these chemicals affect mood, some people believe taking l-methylfolate may help with ...

The amino acid known as L-citrulline is made naturally in your body. Research isn’t clear whether these supplements will help boost exercise performance, lower blood pressure, or help with erectile ...

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-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 ...