Hello! Thank you for your attention. I'm 40 years old now. My skin tone is getting better than before.. My wrinkle around mouth is thinner than before. Arbutin in Japan by Shiseido is much expensive than your products. Arbutin serum is working the skin tone brighter with none irritation. I will need to use your products for a long time. Thank you for your products. - Yoshiko K. Okayama Japan