L-arginine, an essential amino acid, supports overall health by promoting cardiovascular function, tissue repair, and immune defense. As a precursor to nitric oxide, it enhances blood vessel function, benefiting circulation and cardiovascular health. Athletes often use L-arginine supplements to improve exercise performance by increasing blood flow to muscles. However, consulting healthcare professionals is advised before supplementation. Including L-arginine-rich foods in a balanced diet can naturally support health and vitality.