Many cultures use this pepper to keep their food safe from bacteria. But it also improves circulation and blood flow, prevents heart disease, stops bleeding, relieves pain, improves memory, and reduces fever.
Cayenne pepper is high in Vitamin C, though you would have to eat an awful lot to get any significant amount.
Cream form applied directly to sore joints and muscles stops pain, except it feels really uncomfortable when you apply it. They say your body adapts over time. I haven’t tried it myself, but it is getting increasingly more popular.