OK! Announces Pistachios as Its Favorite Healthy Snack

Nu-Kitchen's Geller tells OK! that it's imperative to eat every two to three hours so you'll never be famished. Some great snacks: trail mix, fruit or a protein bar (as long as it's got fewer than 150 calories). OK!'s favorite snack is pistachios. In fact, a recent study at Penn State found that just a 1.5-ounce serving of these nuts can reduce stress. Instead of low blood sugar, moodiness or holiday lines make you crazy, have a handful of pistachios!