Pistachios contain many nutrients essential for healthy skin and hair. Of all the tree nuts, pistachios have the most lutein and zeaxanthin-antioxidants that can help protect skin from the damage of ultraviolet light that contributes to skin aging. The B vitamins and minerals such as copper, magnesium and selenium found in pistachios are necessary for the growth and renewal of healthy skin. The healthy fats in pistachios can help support moist skin and shiny hair. And, at 160 calories per one ounce serving-which is about 49 nuts-pistachios can easily fit into daily habits that help maintain your shape.