It's time to get cracking. Pistachios have a delicious buttery flavor, and a long list of health benefits. They're an excellent source of protein, fiber, antioxidants, and potassium. Plus, they contain healthy monounsaturated fats that may help lower bad cholesterol levels and protect against heart disease. Due to pistachios' ability to reduce the body's response to stress, they make the perfect afternoon pick-me-up. To avoid excess sodium, opt for unsalted nuts.