Bell peppers or (Capsicum annuum) are fruits that belong to the nightshade family. Capsicum comes in various colors, such as red, yellow, orange, and green — which are unripe. NUTRIENT CONTENT : Capsicum is very high in Vitamin C. In fact, red capsicum has the highest vitamin C content among most fruit and vegetables. Bell peppers are mainly made up of water and carbs. Most of the carbs are sugars, such as glucose and fructose. Bell peppers are also a decent source of fiber.