alias: methionine methionine is an essential sulfur-containing amino acid found in protein-rich foods like meat, fish, eggs, and nuts. it plays a vital role in protein synthesis, detoxification, and overall metabolic health chemical properties molecular weight: 149.21 g/mol density: 1.34 g/cm³ melting point: 281°C (decomposes) solubility: soluble in water; slightly soluble in alcohol chemical formula: C₅H₁₁NO₂S usefulness in medicine methionine is a precursor for glutathione, a powerful antioxidant that protects cells from oxidative stress. it aids in liver detoxification by facilitating the removal of heavy metals and other toxins. methionine supports skin health and strengthens hair and nails by providing sulfur for keratin production. it helps regulate fat metabolism by preventing fat buildup in the liver. methionine plays a role in the synthesis of important molecules like S-adenosylmethionine (SAMe), which supports mental health and reduces inflammation. antibacterial and antimicrobial activity methionine itself does not exhibit direct antimicrobial properties but supports immune function and detoxification processes, indirectly aiding in infection control. research highlights: bacteria: escherichia coli research link staphylococcus aureus research link research links methionine and glutathione synthesis methionine and liver detoxification