Although all bell peppers are good sources of vitamins A and C, red bell peppers contain larger amounts of these vitamins than bell peppers of other colors. These vitamins work as antioxidants to neutralize free radicals and reduce the risk of disease. Red bell peppers are also low in calories and fat and provide several other essential vitamins and minerals. A medium red bell pepper also provides about 1.2 g of protein, which is a little more than 2 percent of your daily value. It has about 7.2 g of total carbohydrates, which is also 2 percent of your daily value. About 2.5 g of these carbohydrates come from dietary fiber. This is approximately 10 percent of your daily value of fiber. The rest of the carbohydrates, about 5 g, come from sugar. Red bell peppers are an excellent source of vitamin C. A medium raw red bell pepper contains a whopping 253 percent of the daily value of vitamin C. It also provides 75 percent of the daily value of vitamin A, 17 percent of the daily value of vitamin B-6 and 14 percent of the daily value of folate. A medium raw red bell pepper also offers between 4 and 9 percent of the daily value of vitamin E, vitamin K, thiamine, riboflavin, niacin and pantothenic acid. It does not contain vitamin B-12. Red bell peppers also contain several essential minerals. A medium raw red bell pepper contains 7 percent of your daily value of potassium and manganese. It also provides 4 percent of your daily value of magnesium, 3 percent of your daily value of iron and phosphorus and 1 percent of your daily value of calcium and copper. A medium red bell pepper contains less than 1 percent of sodium and selenium. Red bell peppers also contain the phytochemicals lutein and zeaxanthin. These are the only carotenoids found in the lens and retina of the eye. Consuming foods that contain lutein and zeaxanthin may slow the development of macular degeneration and cataracts, according to the Linus Pauling Institute. These carotenoids are best absorbed with fat, so eating your red bell peppers with a salad dressing or vegetable dip may maximize the health benefits you get from this vegetable.