ferritboy, thanks for your post. I agree that a major component behind immune system disorders is related to a faulty digestion system. Taking the long road to improve one's digestion system does often offer relief. Unfortunately this view is not widely shared in the medical community. So instead of managing symptoms through dietary means too many folks are told only about powerful and expensive medications. Doctors should really include diet/supplements up front in their arsenal to treat psoriasis.
Panch: 2-3% of the population have psoriasis, but I believe autoimmune disorders might include as many as 8-10% of the general population. Beyond this there are other ailments such as eczema and asthma that are often thought of having roots in a defective digestion system. Yet having said this, certainly there are genetic markers related to psoriasis. But as we know, just because you have these genetic markers it doesn't mean you will get psoriasis. Something else, like a wonky digestion system, various infections, or a combination of factors, that induce these genetically predisposed people to develop the disease.
_Lazza