The Quest Nutrition Hero Protein Bar in Chocolate Peanut Butter flavor contains 16 grams of protein, 10 grams of fiber, and only 4 grams of net carbs. The protein in this bar comes from a blend of milk protein isolate and whey protein isolate, which are high-quality sources of protein. The bar also contains soluble corn fiber, which is a type of fiber that is easily digested and helps to support digestive health. Quest Nutrition Protein Bar Chocolate Peanut Butter flavor could be a good option for those looking for a quick and easy way to add some extra protein to their diet or need a healthy snack option on-the-go.