Everyday Mediterranean-style cooking, which has promising early evidence in psoriasis and is good eating in its own right. Food like this sits alongside the care your clinician gives you rather than replacing any of it.
Drinkers are more likely to have psoriasis, but the association does not survive a genetic test of cause. What does survive is the effect of alcohol on how well psoriasis treatment works, and on a liver that is already carrying more risk than most.
Coeliac disease is about twice as common in people with psoriasis. That makes gluten worth investigating and makes going gluten-free first the wrong move, because it destroys the test.
Broad food elimination is popular in psoriasis because it feels like doing something. As an experiment it is incapable of producing an answer, and there is a cheaper one.
Psoriatic disease travels with cardiometabolic risk, and that is where eating well has its clearest job. Judging every meal by your plaques is a scoreboard nobody can win.
Vitamin D, fish oil, probiotics and curcumin have all been tested. The results fail in the same shape every time, and that shape tells you what to ask before you buy.
Every statement in these guides is recorded as a claim with its sources and the rule attached to it. Read the claim ledger for psoriasis — 34 claims, each separately citable.