another thing i found very interesting. I have never been able to get a suntan in my life. i either burn or i am white and if i burn i usually get sun poisoning(really itchy). I think some of this has to do with me having partially red hair and red heads tend to all have the same problem. Anyway - i was out all weekend - no shirt most of the time - no sun tan lotion. I know have a tan - very little burning and no sun poisoning. the only thing i can attribute this to is the IGF. dunno why it would do this but its really cool for me(along with my new hair on my head).