L – methionine

L-Methionine is an essential sulfur-containing amino acid that plays a crucial role in protein synthesis, detoxification, and antioxidant support. It serves as a precursor for key compounds like cysteine, taurine, and glutathione, which are vital for liver health, metabolism, and cellular protection. Since the body cannot synthesize it naturally, L-Methionine must be obtained through diet or supplementation.