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.
Nutritional Value. Bell peppers contain very high amounts of vitamin C and Vitamin A. One cup of raw, red bell peppers supplies roughly 290 percent of the recommended daily allowance of vitamin C and 105 percent of the RDA for vitamin A. Bell peppers also contain significant amounts of vitamin B 6 and dietary fiber.