- Wound Healing: Amino acids like arginine and glutamine are essential for wound healing and tissue repair. - Immune Function: Amino acids support immune function by contributing to the production of antibodies and immune cells. - Muscle Maintenance: For patients with muscle-wasting conditions, branched-chain amino acids (BCAAs) like leucine, isoleucine, and valine are crucial for muscle protein synthesis. - Mental Health: Some amino acids are precursors to neurotransmitters. For instance, tryptophan is a precursor to serotonin, which affects mood and sleep.