Argan nut oil, derived from the kernels of the Argania spinosa tree native to Morocco, is used in dermatology primarily for its moisturizing and anti-inflammatory properties. There is a moderate level of scientific evidence supporting its use for dermatitis, particularly for atopic dermatitis and other forms of eczema. The oil is rich in fatty acids (especially oleic and linoleic acids) and contains tocopherols (vitamin E), both of which are known to support skin barrier function and reduce inflammation.

Several in vitro and small clinical studies suggest that topical application of argan oil can improve skin hydration, reduce redness, and decrease symptoms associated with dermatitis. Its antioxidant content may also help mitigate oxidative stress in inflamed skin. However, large-scale, high-quality randomized controlled trials in humans are limited, and most studies focus on general skin barrier improvement rather than specifically on dermatitis.

In summary, while there is a growing scientific basis for the use of argan nut oil in supporting the management of dermatitis symptoms, the evidence is still emerging and not robust. The rating reflects the presence of some clinical and mechanistic studies, but also the need for more rigorous trials to confirm its efficacy specifically for dermatitis.