The combination not only increases the efficacy of retinol while reducing its concentration and the risk of hypersensitivity, but also helps achieve better effects in collagen fibre production (the use of these two ingredients increases collagen III by 238%). Hydroxystearic acid also significantly reduces UV-induced p53 marker induction. The p53 protein plays an important role in the melanogenesis pathway. This ingredient also strongly reduces the formation of UV-damaged cells — it has a photoprotective effect and helps prevent photoageing. The unique ampoule formula ensures high stability and efficacy of the substances thanks to activation immediately before use.