Cayenne pepper is a type of pepper commonly used in cooking to add heat and flavor to dishes. It is native to South America and has a heat level of 30,000 to 50,000 Scoville heat units, which is significantly hotter than the average jalapeno pepper, which has a heat level of 2,500 to 8,000 Scoville heat units. Cayenne pepper is usually sold as a ground spice and is often used in dishes such as sauces, marinades, and rubs. It can also be used as a natural remedy to help improve circulation and reduce inflammation.