It is recommended that the cayenne powder be used, as opposed to capsules. It is believed that you are only getting a small part of the potential effect of cayenne pepper by taking it in capsules. When you put cayenne in your mouth, your stomach secretes digestive juices before the cayenne ever gets there. So when the cayenne gets down there, your stomach is ready for it.
But if you swallow a capsule, your tongue tastes nothing. A capsule goes down in your stomach, and your stomach notices nothing, at first. Then, 5 minutes later the gelatin bursts, and you have a 1/2 teaspoon of cayenne pepper in your stomach and your body is shocked. You surprised it.
What is going on is that some of cayenne's healing action occurs right in your mouth. As cayenne touches your tongue, the cayenne absorbs in seconds and nerve endings send signals throughout the body - sending waves of fresh blood throughout your body.