Bell peppers are refreshing, mild-flavored vegetables that come in many different colors, including red, yellow, and green. Like other non-starchy vegetables, bell peppers are low in calories and have a high water content and a good amount of fiber, making them a great choice for people who are trying to lose weight or prevent or manage heart disease or type 2 diabetes. Bell peppers are one of the best sources of vitamin C, an antioxidant that helps protect against and manage arthritis, osteoporosis, cataracts, and macular degeneration, and keeps skin, hair, and teeth healthy. Bell peppers also contain vitamin B6, which some research suggests may help reduce the risk of cardiovascular disease. Red bell peppers are a good source of vitamin E, beta-carotene, and beta-cryptoxanthin, other antioxidants involved in joint, skin, and eye health. IBS sufferers take note: Some people with IBS are sensitive to raw vegetables and experience discomfort after eating them.