 Like millions of other teens and tweens, Stella says she's tempted to try skin care products that pop up on her social media feed. I see it and I'm like, OK, everyone has this. Let me try it out. Now, Stella's mom is a nurse practitioner, so she steers the teen away from ingredients that aren't appropriate for her age. Things like retinol, which increases cell turnover, but can also make skin more sensitive to the sun. But not all kids or parents are as aware of potential pitfalls.