The present invention relates to a cosmetic composition, advantageously an eco-biological cosmetic composition, comprising: -
polyglutamic acid or a salt thereof; and - at least one
peptide derivative represented by the general formula (I) in which: - R1 represents a
hydrogen atom, an acyl radical or an acyloxy radical; and - R2 represents the
side chain of an alpha-
amino acid chosen from the group consisting of
phenylalanine,
glutamic acid,
arginine,
cysteine,
methionine,
histidine and
tyrosine. The present invention also relates to the use of said cosmetic composition for combating
skin redness and / or
skin aging; to its use for preventing and / or combating cutaneous vascular hyperproliferation and / or
cutaneous inflammation and / or
rosacea; and to a method for selecting compounds suitable for preventing and / or combating these pathologies.