Pressed from the nut of the walnut tree. Walnut oil is high in linoleic acid and helps to regenerate and moisturize damaged dry skin. Walnut trees have been cultivated in Europe since Roman times for both culinary and cosmetic uses. The light oil extracted from the walnut contains essential fatty acids important for maintaining beautiful skin and hair. These acids help create a protective layer on the skin and help prevent water loss. Walnut oil is used to treat dry skin and is a key ingredient in many anti-wrinkle and anti-aging products.