Dietitians universally agree that pistachio nuts a great snack choice, as they are full of nutrients such as B vitamins, magnesium, and potassium. They also can ultimately help you lose weight, manage blood sugar levels, and boost your (good) HDL cholesterol. "These nuts are one of the highest in protein and fibre, and they hit the superfood trifecta because they are also a great source of healthy unsaturated fats," Zeitlin added.