10.1160/TH05 32
[7] A proteinogenic amino acid [edit] Cysteine and methionine are the two sulfur-containing proteinogenic amino acids
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Plain sterile water offers no such protection, leading to a much shorter lifespan
After that, its efficacy may begin to decline
Ingredients:Deionized Water, Glycerin, Propanediol 1,3, Dimethyl Isosorbide, Polyacrylate Crosspolymer-6, Copper Tripeptide-1, Matrixyl 3000 (Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7), Argireline (Acetyl Hexapeptide-8), Palmitoyl Pentapeptide-4, Phenoxyethanol, Caprylyl Glycol