Bell peppers are rich in many vitamins and antioxidants, especially vitamin C and various carotenoids. For this reason, they may have several health benefits, such as improved eye health and reduced risk of several chronic diseases. All in all, bell peppers are an excellent addition to a healthy diet.
Health Benefits
Technically a fruit, red peppers are more common as a staple in the vegetable produce section. They're also an excellent source of vitamins A and C. Each half cup of raw red pepper provides you with 47 percent of your daily recommended intake of vitamin A and 159 percent of your vitamin C.
Some of the other health benefits of red peppers include:
Immune System Support
 
Vitamin C is a powerful antioxidant that fights cell damage, boosts immune system response to microbes, and has an anti-inflammatory effect. Red peppers are rich in vitamin c, though roasting them reduces their vitamin C content by up to 25 percent. 
Improve Eye and Skin Health
The vitamin A and beta-carotene in red peppers offers good support for your overall vision and eye health. Vitamin A is also helpful in supporting skin cells, healing wounds, and boosting white blood cell growth.
Nutrition
Red peppers are a rich source of several vitamins, minerals, and antioxidant compounds. Interestingly, red bell pepper is also the only Capsicum variety that contains little to no capsaicin—the compound responsible for spiciness.
Red peppers also contain:
Calcium
Vitamin A
Vitamin C
Vitamin E
Iron
Potassium
Magnesium
Beta-carotene
Vitamin B6
Folate
Niacin
Riboflavin
Vitamin K