A little known fact: one red bell pepper has twice as much vitamin C as an orange. Vitamin C is a powerful antioxidant that helps clear your body of free radicals and keeps your skin and blood vessels healthy and strong. The vitamin C in bell peppers may also help prevent arthritis or slow the progression of the disease. Red bell peppers also deliver beta-carotene and lycopene, two more antioxidants that have been associated with decreased risk of eye diseases like cataracts. And, thanks to their high water content, bell peppers of all colors are a high-volume, low-cal food that's very figure-friendly.