Dear Linda, Since I am still in my learning phase, I would appreciate your sharing with us any research supporting this mechanism. It goes against everything I know to be true but that does not mean that it cannot BE true. I am looking forward to learning OR putting this misconception to rest. Hi Walt, Dr. D'Adamo Posted a note on his message board about vitamin C and psoriasis. Since you kind of know him, maybe you could ask him about it.
Vitamin D is very good for psoriasis, as is sunlight.
Scleroderma is having an excess of collagen. Vitamin C aids in the formation of collagen. I would say a person would want to decrease collagen production if they had this disease. After Dr. D's post there was a great discussion on psoriasis, but unfortunately I can't find it in the archives. If I remember right, somebody researched Vitamin C and psoriasis in PubMed and this information can be found there.