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METHYLMETHIONINE

CAS 4727-40-6
88

Safety score · 0–100

Good

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

S-Methylmethionine, a naturally occurring methylated derivative of the essential amino acid methionine.

Methylmethionine (S-methylmethionine, also known as vitamin M) is a naturally occurring sulfonium compound found in plant and mammalian tissues. It is structurally related to the essential amino acid methionine with an additional methyl group on the sulfur. As a naturally derived compound with a safety profile comparable to its parent amino acid, it has no EU cosmetic prohibition entries and is generally regarded as safe in cosmetic applications, consistent with its high safety score.

Skin benefits

  • amino acid derivative
  • supports skin barrier function
  • good tolerability profile

Known concerns

  • generally safe in cosmetic use
  • no major EU restrictions

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.