The invention relates to a composition for slowing cellular ageing which comprises at least: S-Adenosyl-methionine; an extract of at least one adaptogenic plant selected among plants belonging to the Astragalus, Dioscorea, Schisandra, Panax, Eleuterococcus, Rosmarinus, Pfaffia, Morinda, Cordyceps or Lepidium genera; a vitamin selected among the B vitamins, vitamin C, or a mixture thereof; except for compositions comprising 7-keto-DHEA and an extract of one or more adaptogenic plants belonging to the Dioscorea or Lepidium genera. A liquid or solid food supplement can be characterised in that it comprises the composition. A dermatologically acceptable composition can be characterised in that it comprises at least 10 wt % of the composition.