Bell peppers Include all colors of bell peppers in your diet as they are a great source of vitamin C. Vitamin C guarantees efficient transition of oxygen to hair follicles. Besides, it also helps in the formation of collagen and promotes hair growth and prevents hair breakage.The bell pepper is a cultivar group of the species Capsicum annuum. Cultivars of the plant produce fruits in different colours, including red, yellow, orange, green, white, and purple. Bell peppers are sometimes grouped with less pungent pepper varieties as "sweet peppers".