I wondered about the sun as well. The doctors tell you that the damage is already done before you hit 21 and won't show up until years later. If the skin is continuously shedding and regenerating then how is the damage done????? I really find this inane. It's just to bad my hubby doesn't. He just found out he has squamous cell skin cancer on the top of his head. This after he had a rare (germ cell tumour) cancer 2 years ago. I'm trying to get him to do some cleansing and clean up his act, but he follows "modern medicine". Actually, it's because of what I've seen him go through that I have been doing all this cleansing. I really happened on this site by accident and boy am I ever glad I did.