COSMETIC COMPOSITION COMPRISING A MUCONOPEPTIDE

A cosmetic composition including as an active substance a cosmetically effective amount of at least one mu-conotoxin peptide It further concerns a composition wherein the mu-conotoxin peptide is Argninine, lysine polypeptide, CAS Number: 937286-43-6, Molecular formula C92, H139, N35, O28, S6 acetate salt (molar mass 2376 g/mol.). Also, the use of the composition to improve the mechanical properties of the skin, tonicity and/or firmness and/or elasticity of the skin.