These energy-rich snacks lower bad cholesterol, thanks to plant sterols, and benefit diabetics by lowering blood sugar. They’re also rich in amino acids, which bolster testosterone levels and muscle growth. Almonds are also stuffed with vitamin E, which helps defend against sun damage. In a study, volunteers who consumed 14 milligrams of the vitamin (about 20 almonds) per day and then were exposed to UV light burned less than those who took none. And because vitamin E is an antioxidant, it also works to keep your arteries free of dangerous free radicals. Low levels of vitamin E are also associated with poor memory performance and cognitive decline, says dietitian Sari Greaves of New York Presbyterian Hospital–Cornell.