What it is: These are compounds that are chemically derived from or closely related to amino acids but have been modified through metabolic processes. They retain some structural similarities to their parent amino acids but have distinct functions in the body.
Common examples:
Creatine (derived from glycine, arginine, and methionine)
L-carnitine (derived from lysine and methionine)
Taurine (derived from cysteine)
Beta-alanine (a modified form of alanine)
Why they matter: Amino acid derivatives often have specialized functions beyond protein synthesis. Creatine supports energy production in muscles, L-carnitine helps transport fatty acids for energy metabolism, taurine supports cardiovascular and neurological function, and beta-alanine helps buffer acid in muscles during intense exercise.
In supplements: Commonly found in sports nutrition products, energy formulas, and targeted health supplements.
