**13. Conclusion**

Diet is an important factor in the etiology and pathogenesis of psoriasis. Low-calorie and vegetarian diets may be beneficial to the treatment of this condition. Although the results regarding the oral supplementation of fish oil are inconsistent, patients are recommended to consume fish rich in omega 3 PUFAs and parenteral infusions of PUFAs are recommended for patients hospitalized with acute psoriasis. Further studies are needed to clarify the role of a gluten-free diet, which may improve the severity of the disease in patients with IgA and/or IgG antigliadin antibodies. Moreover, the consumption of fruit and vegetables may be beneficial due to their high antioxidant content. Vitamin D is an important treatment option due to its immuno-regulating and anti-proliferation activity. Patients with psoriasis should not consume alcoholic beverages in order to avoid exacerbation of the disease.
