Red chilies are low in calories but packed with essential nutrients. They are an excellent source of vitamin C, providing more than twice the amount found in oranges. Red chilies also contain vitamin A, potassium, and various B vitamins. Red chilies contain a compound called capsaicin, which gives them their spicy taste. Capsaicin has been shown to increase metabolism and enhance fat burning, which may aid in weight management and promote a healthy body weight.