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Psoriasis is a chronic, immune-mediated inflammatory disease that causes skin cells to build up more quickly than usual, resulting in raised, inflamed, scaly patches on the skin. Its development involves immune-system activity, genetic susceptibility, and environmental factors. Psoriasis may also be associated with psoriatic arthritis, a condition that affects the joints. Research suggests that dietary patterns, body weight, and certain nutritional factors may influence inflammation and the course of psoriasis, although diet is not a replacement for medical treatment.
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Editorial responsibilityReferences and further reading
- Wang Q, Wang J, Sun X, et al. Evidence-based dietary recommendations for patients with psoriasis: A systematic review. Clinical Nutrition. 2025;47:68-82. doi:10.1016/j.clnu.2025.02.005. View source
- Ford AR, Siegel M, Skokan J, et al. Dietary Recommendations for Adults With Psoriasis or Psoriatic Arthritis From the Medical Board of the National Psoriasis Foundation: A Systematic Review. JAMA Dermatology. 2018;154(8):934-950. doi:10.1001/jamadermatol.2018.1412. View source
- Zuccotti E, Oliveri M, Girometta C, et al. The role of diet in the management of psoriasis: A scoping review. Journal of Human Nutrition and Dietetics. 2023. doi:10.1111/jhn.13297. View source
How to cite this entry
CNP (2026). Psoriasis. In CNP Encyclopedia Editorial Board (Eds.), Encyclopedia of Nutritional Psychology. The Center for Nutritional Psychology.
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