Jungbunzlauer’s glucono-delta-lactone (GdL) is a polyhydroxy acid known as a mild, effective exfoliating agent. Its beneficial impact was proven in a four-week clinical study, applying a minimalistic face serum formulation with 8% GdL. After the test period, skin impurities and excess sebum were markedly reduced and the excellent skin tolerability was confirmed, resulting in a highly positive product rating from the panellists. Download the study to learn more about GdL as a powerful, multifunctional ingredient in the daily skin care routine.