The larger the bar, the more calories you will get. As for Fat, look for about 5 grams or less per bar. Again check the Nutrition Facts Label. Energy bars are sometimes fortified with extra vitamins or minerals. There usually aren't enough herbs in the bar to be good or bad for you.
Energy bars are expensive.
If you are looking for quick snacks for during the day, consider foods are a part of your regular daily diet like breakfast cereal in a bag, pretzels, yogurt, crackers and cheese, raising and nuts or fresh fruit. . Level 5 is walking as if you were on your way to an appointment. Level 6 is walking as if you were five minutes late for an appointment. Level 7 is walking as if you were 10 minutes late for an appointment. After warming up with some casual walking, note the time 2.