Editing Psoriasis (section)

===Diet===
Uncontrolled studies have suggested that individuals with psoriasis or psoriatic arthritis may benefit from a diet supplemented with [[fish oil]] rich in [[eicosapentaenoic acid]] (EPA) and [[docosahexaenoic acid]] (DHA).<ref name="Kaimal2010">{{cite journal | vauthors = Kaimal S, Thappa DM | title = Diet in dermatology: revisited | journal = Indian Journal of Dermatology, Venereology and Leprology | volume = 76 | issue = 2 | pages = 103–15 | year = 2010 | pmid = 20228538 | doi = 10.4103/0378-6323.60540 | doi-access = free | title-link = doi }}</ref> A low-calorie diet appears to reduce the severity of psoriasis.<ref name=Shu2019/> Diet recommendations include consumption of cold water fish (preferably wild fish, not [[Fish farming|farmed]]) such as [[salmon]], [[herring]], and [[mackerel]]; extra virgin olive oil; legumes; vegetables; fruits; and whole grains; and avoid consumption of alcohol, red meat, and dairy products (due to their saturated fat). The effect of caffeine consumption (including from coffee, [[black tea]], mate, and dark chocolate) remains to be determined.<ref name=BarreaNappi2016>{{cite journal | vauthors = Barrea L, Nappi F, Di Somma C, Savanelli MC, Falco A, Balato A, Balato N, Savastano S | title = Environmental Risk Factors in Psoriasis: The Point of View of the Nutritionist | journal = International Journal of Environmental Research and Public Health | volume = 13 | issue = 5 | pages = 743 | date = July 2016 | pmid = 27455297 | pmc = 4962284 | doi = 10.3390/ijerph13070743 | doi-access = free | title-link = doi }}</ref>

Many patients report improvements after consuming less tobacco, caffeine, sugar, [[nightshades]] (tomatoes, eggplant, peppers, [[paprika]] and white potatoes) and taking [[probiotic]]s and oral Vitamin D.<ref name=AfifiDanesh2017>{{cite journal | vauthors = Afifi L, Danesh MJ, Lee KM, Beroukhim K, Farahnik B, Ahn RS, Yan D, Singh RK, Nakamura M, Koo J, Liao W | title = Dietary Behaviors in Psoriasis: Patient-Reported Outcomes from a U.S. National Survey | journal = Dermatology and Therapy | volume = 7 | issue = 2 | pages = 227–242 | date = 19 May 2017 | pmid = 28526915 | pmc = 5453925 | doi = 10.1007/s13555-017-0183-4 | doi-access = free | title-link = doi }}</ref>

There is a higher rate of [[celiac disease]] among people with psoriasis.<ref name=BarreaNappi2016 /><ref name=NiChiu2014>{{cite journal | vauthors = Ni C, Chiu MW | title = Psoriasis and comorbidities: links and risks | journal = Clinical, Cosmetic and Investigational Dermatology | volume = 7 | pages = 119–32 | year = 2014 | pmid = 24790463 | pmc = 4000177 | doi = 10.2147/CCID.S44843 | type = Review | doi-access = free }}</ref> When adopting a [[gluten-free diet]], disease severity generally decreases in people with celiac disease and those with [[anti-gliadin antibodies]].<ref name="Kaimal2010"/><ref name=LefflerGreen2015>{{cite journal | vauthors = Leffler DA, Green PH, Fasano A | title = Extraintestinal manifestations of coeliac disease | journal = Nature Reviews. Gastroenterology & Hepatology | volume = 12 | issue = 10 | pages = 561–71 | date = October 2015 | pmid = 26260366 | doi = 10.1038/nrgastro.2015.131 | s2cid = 15561525 | type = Review }}</ref><ref name=BhatiaMillsop2014>{{cite journal | vauthors = Bhatia BK, Millsop JW, Debbaneh M, Koo J, Linos E, Liao W | title = Diet and psoriasis, part II: celiac disease and role of a gluten-free diet | journal = Journal of the American Academy of Dermatology | volume = 71 | issue = 2 | pages = 350–8 | date = August 2014 | pmid = 24780176 | pmc = 4104239 | doi = 10.1016/j.jaad.2014.03.017 }}</ref>