Dude, cayenne supplements by themselves can kick some serious ass. I used to take cayenne pills when I had to work dinner shift at a very busy resturant (Red Lobster, don't judge), and thirty minutes after I took them, it felt like there was a fire in my stomach. It causes your pulse to quicken and you get a lot of quick energy.

I don't take it anymore, I have high blood pressure now and don't need stuff that makes my blood pump faster.