Cayenne pepper stimulates digestion and muscle movement in the intestines, which helps restore deficient digestive secretions, and aids absorption of food nutrients. Cayenne also warms the body and stimulates the release of mucus from the respiratory passages. When it comes to nutrients, cayenne is relatively high in vitamin A, C and E. It also contains vitamin B6, riboflavin, potassium and manganese. The active ingredient in cayenne is capsaicin, which has been shown to reduce appetite and increase fat burning. Some animal studies have also found capsaicin to combat certain forms of cancer, including lung, liver and prostate cancer.