These bars are good on-the-go options if you choose wisely. “Some are so loaded with carbohydrates or protein that it’s like eating a bagel or big piece of chicken,” says Love. That’s fine if you’re replacing a meal. If you’re staving off hunger, Love suggests grabbing a bar that has 10 to 20 grams of protein, fewer than 30 grams of carbs, and no more than 10 grams of fat. “That’s like eating half of a lean turkey sandwich,” she says.