The Promise. Lose up to 10 pounds in 2 weeks -- and that's just the beginning of what the Mayo Clinic Diet says it can do for you. The Mayo Clinic Diet is the official diet developed by the Mayo Clinic in Minnesota.
1 18 calories in 1 cup of sliced green peppers (3.2 oz or 91g). 2  30 calories in 1 cup of chopped green peppers (5.3 oz or 149g). 3  24 calories in 1 average size green pepper.
Low in Calories. Bell peppers are a great, low calorie snack. One red bell pepper contains only 30 to 40 calories and has a satisfying crunchy bite. The fiber that bell peppers contain will help you to feel full with very few calories. Keep slices of bell peppers in the refrigerator, so you'll always have something healthy to reach for when you're having a snack attack.