I've read about it on various threads, especially the Princessing one and people seem to think it is something that is beneficial.
So, I want to try it too!
It seems to be listed as an ingredient is some creams but I saw a small bottle of it in TK Maxx the other day. I didn't buy it as I have no idea at all how to use it.
Is it good? What are the best ones and do you just slap it on before moisturiser and then sit in a dark room for a week?