How are the chemicals in proactiv bad for your skin in the long run?

I used proactiv before and it worked well and got rid of my pimples in less than a week, but then I searched around and found out how much chemicals it had in it that was bad for your skin... but I didn%26#039;t know why it was bad for your skin like what harm are the chemicals to your skin anyway? Like, the product got rid of my pimples and when I stopped using it, there were zits growing again but that%26#039;s normal because they are bound to grow back... so why is it so bad?|||I%26#039;m not sure how the chemicals are bad for you, but i do know that Proactive is a scam. It works for a while, but i guess your skin gets addicted to it or something, because when you stop, they grow back worse. That way people will buy more of their product. Try Clean n%26#039; Clear. It works better for me, but it depends on your skin type.|||it isnt no skni care company is going to make a skin product that is bad for ur skin...