Walnut oil is a type of oil extracted from the nuts of the walnut tree. It is known for its rich, nutty flavor and is commonly used in cooking, salad dressings, and baking. The oil is also valued for its high content of polyunsaturated fats, particularly omega-3 fatty acids, which are beneficial for heart health. In addition to culinary uses, walnut oil is often utilized in cosmetics and skincare products due to its moisturizing properties. It contains antioxidants and vitamins that can help nourish the skin. However, it should be stored in a cool, dark place to prevent it from going rancid.