The invention relates to a topical composition comprising an extract of Tiger lily (Lilium tigrinum) enriched in low molecular weight RNA. The invention also relates to a method of cosmetic care including the topical application a composition comprising an extract of Tiger lily (Lilium tigrinum) in a physiologically acceptable medium, in order to reduce skin signs of aging and photo-aging. The invention is also directed to a cosmetic method of treatment to improve cell viability, to improve cell protection against particulate matter and against DNA damages, and to reduce cellular senescence.