PROBLEM TO BE SOLVED: To provide a material that can extend life by preventing aging by aging of an individual, and that is safe even if ingested for a long period of time.SOLUTION: A sirtuin activator or a senescence retardant includes as an active ingredient, a compound shown by formula (I) (wherein R1 denotes a saturated or unsaturated straight chain or branched alkyl group; and R2 denotes a hydrogen atom or a methyl group).