Are walnuts on your grocery list? They should be! Walnuts are an invaluable part of a healthful diet, especially in winter. They can help moisturize from the inside out, which is great for chapped winter lips and skin. They’re also great sources of potassium, calcium, fiber, magnesium, and omega-3 fatty acids. They’re brain food, and powerful for cardiovascular health. Additionally, walnuts may help prevent prostate cancer and type 2 diabetes in women.