This light, quick absorbing serum contains a tri-retinoid complex: Retinyl Palmitate, Retinyl Propionate and Retinol in a stable colloidal serum concentrate with the addition of the retinoid effect boosters Revinage® and NovoRetin™. Step up from Retinol Serum to Retinol Serum Forte only once the skin is fully acclimatised to Retinol Serum.