When Ayva Peña got a phone at age 10, her interest in skin care skyrocketed.

At first, she bonded over it with her mother, Giselle Peña. Together, they would have spa days with face masks and take occasional shopping trips to try out new products. But when the Rhode Island mother found a $300 anti-aging face cream in Ayva's medicine drawer, it gave her pause.

"I got very upset. She's 15 years old," Peña said. "It says it makes your skin ageless, improves fine lines, wrinkles and firmness. I was like, 'This is not for you, girl.'"

Peña is among a growing number of parents concerned about how content on social media platforms is influencing children and teens into trying out elaborate, often age-inappropriate skin care products. Now, a study published Monday in the journal Pediatrics ma

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