 contain active ingredients that are just too harsh for people in this age group. Preteen skin is much thinner. It is more sensitive to those chemicals. These products are designed ultimately for older people. So what can happen to these preteens is that their skin barrier, their stratum corneum gets compromised. So their skin is more sensitive and prone to irritation. So clearly teens and preteens are going to stay interested in this, especially given these trends on TikTok. What is an appropriate skincare routine for a preteen?