Hello and
to Psoriasis Club
Have you tried Coconut Oil you wont get more natural than that. Put it on, wrap your head in cling film, leave on for a few hours or overnight then wash out. Or another alternative is a 50/50 mix of Olive and Peanut Oil use the same way.
Hope others have more choices for you, but for the moment you may find these threads interesting.
Harmful Ingredients in Skincare Products
And these two threads talk about shampoo.
http://psoriasisclub.org/showthread.php?tid=155
http://psoriasisclub.org/showthread.php?tid=369
Regards.
Fred.