Zinc on its own is unlikely to help greatly, however one poster on a USA board recently said if yo combine it with vitamin b1 it can help alot more. I also advise looking at vit k2 which i believe psoriasis suffers r low in. And vit d3 which we ARE low in on the whole as our bodies use alot of it upAll are easily obtainable, holland and barret sell all four.
vit b1 200mg a day
vit k2 90mg a day (2 tabs)
vit d3 (2000iu) a day
zinc 25-50ug
Here is his post:
I have been playing with various food and supplement combinations for years and have read many articles looking for clues, about beneficial supplements.
Something that came up recently in my self-experiments and reading, is the combination of thiamine and zinc taken together. Seems a combination of zinc and thiamine deficiencies together is common in North America.
High dose thiamine of say 200mg with zinc 50 mg may be very helpful for some people.
This combination can improve your whole nutritional profile, if you are deficient.
Seems they are vital for producing gastric acid, and being deficient reduces the nutrients that you get from all your food, due to poor digestion in the stomach.
You need both together, to see the benefit of either, if you are deficient in both, which as I said is common. Taking only one will not overcome the deficiency of the other, since both are needed to produce gastric acid, amongst other things.