Vegetable oils, such as olive oil, coconut oil, and sunflower oil, have been used as moisturizers for skin conditions like psoriasis. Their use is supported by some scientific evidence, primarily for their role in improving skin barrier function and reducing transepidermal water loss. Studies have shown that emollients containing vegetable oils can help alleviate dryness, scaling, and discomfort associated with psoriasis by hydrating the skin and providing a protective barrier. Some oils, like olive oil, contain anti-inflammatory compounds (e.g., oleocanthal) and antioxidants, which may provide additional benefits in reducing mild inflammation.

However, the scientific evidence is limited and primarily based on small clinical trials or in vitro studies. There is little high-quality, large-scale clinical research directly supporting the use of vegetable oils as a primary treatment for psoriasis. Most guidelines recommend these oils as adjuncts to conventional therapy rather than standalone treatments. They are valued for their safety, accessibility, and ability to support the skin’s barrier, but they do not address the underlying immune dysregulation of psoriasis.

In summary, vegetable oils are scientifically validated as supportive moisturizers for psoriasis, helping to manage symptoms rather than treat the disease itself. Evidence for their use is modest, and they should be considered complementary to standard medical treatments.