Is it OK to use Proactiv at this age?

I am 10 years old. I know Proactiv is for teenage people but I have alot of arm acne and alot of acne on my thighs. I don't really have any acne on my face and I know that Proactiv sells body care. Is my skin to young to be having Proactiv on it? (only arms and thighs) I drink a lot of water but really nothing seems to be working.