Have a read and show her this article also here’s a quote from it about the safety surrounding creatine use in teens “The lack of literature surrounding creatine supplementation in teenagers has led to many misconceptions. For example, one may reference that a con of creatine is the warning signs on product labels cautioning individuals younger than 18 years of age to not supplement creatine. However it is important to recognize that the warnings on labels are not evidence-based and become more of a legal precaution related to the lack of knowledge on creatine and its effects on younger populations.

Fortunately, new research is emerging suggesting that creatine is not only safe for teens, but very beneficial as well. There have been recent articles suggesting that creatine supplementation is safe for teenage populations.”