Abstract
Psoriasis is a multi-system, chronic, non-infectious, autoimmune, and inflammatory disorder that mainly affects the skin and has a multifactorial etiology. Nutrition has always been a very important line in the management of multiple diseases, whether dermatological or otherwise. Although it is more important in some diseases than others, nutrition could probably always play a role in augmenting and improving recovery. The
advantages of optimizing nutrition and using it as a tool in the management of diseases are many, including cost, knowledge of long-term complications if present and less-to-no side effects compared to newly produced medications. Those nutrients are also likely to benefit one's overall health and not just the pressing condition. Thus, this review aimed at providing an overview of nutrients, such as vitamin D and omega-3 (n-3), and obesity in relation to psoriasis. Using standard search engines, the present study reviewed how vitamin D, n-3, and weight loss can help patients dealing with psoriasis. Evidently, vitamin D and n-3 were found beneficial for alleviating psoriatic symptoms, especially vitamin D, because of its steroid sparing effects. Weight loss in obese individuals with psoriasis was found not only in improving psoriatic lesions as reflected in Psoriasis Area and Severity Index but also it protected them against metabolic syndrome. It is important also to note that for patients with psoriasis to use these substances as they could prevent them from developing complications when using conventional medications such as steroids and help them in other areas such as psoriatic arthritis, metabolic syndrome and cardiovascular diseases.

Key words: Psoriasis, vitamin d, omega 3, n-3, obesity, weight loss