FIELD: medicine, geriatrics. SUBSTANCE: invention proposes biologically active compound tetrapeptide L-alanyl-L-glutamyl-L-asparagyl-glycine of the general formula: L-Ala-L-Glu-L-Asp-Gly and its using as agent showing geroprotective activity. Pharmacological agent containing effective amount of tetrapeptide or its salt as an active component is proposed for parenteral, intranasal, oral and topical using. Method of prophylaxis of early ageing involves prophylactic and/or curative administration in patient the pharmacological agent in doses 0.01-100 mcg/kg of body mass, at least once for period that is necessary to obtain the therapeutic effect. Invention can be used for prophylaxis of early body ageing. EFFECT: enhanced effectiveness of agent. 11 cl, 17 tbl, 10 ex
