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 ...

L-arginine is an amino acid that may help promote blood flow, athletic performance, and wound healing, among other benefits. But taking L-arginine supplements may interact with certain medications.

Taking L-arginine as a supplement may increase blood flow and muscle growth. For some, it may also cause side effects, such as nausea or diarrhea. L-arginine is one of the amino acids the body needs ...

L-arginine is one of many amino acids the body needs to function properly. Like other amino acids, L-arginine plays a role in building protein. The body can use the protein to help build muscle and ...