Long term remission

i'm 67 and I have had psoriasis for my whole adult life. Two years ago I addressed my diabetes by following a very strict reduced calorie diet. For almost 3 months I ate only 800 calories per day. In the main, this was eaten in one meal, snacking didn't happen often but if I did, I ate sweet red peppers. These sweet red peppers were also included in many of the meals I ate. At the end of the diet, I was 2.5 stones lighter, diabetes had reversed and psoriasis had disappeared completely. I had it on both hands, my elbows and my knees. It hasn't reappeared. I don't know if it's what I ate or what I no longer ate. What I am convinced of is that diet was the only effective treatment that has ever worked. I've had light treatment and a range of creams etc - both applied at home and in hospital. I still haven't returned to eating cheese or bread in anything other than small quantities. The weight, diabetes and psoriasis remain in the past.