onagre oil, prunus oil, palm oil, monoi oil , HEPES; procysteine; O-octanoyl-6- D-maltose; the disodium salt of methylglycinediacetic acid, steroids such as diosgenin and derivatives of DHEA; DHEA or dehydroepiandrosterone and/or a precursor or chemical or biological derivative, N- ethyloxycarbonyl-4-para-aminophenol, bilberry extracts; phytohormones; extracts of the yeast Saccharomyces cerevisiae