Baking soda normalizes your skin's 'mantel'/normalizes your skin's pH level so that candida and other fungus /bacteria do not thrive on it. It also neutralizes acids.
Cayenne is a warming spice that causes you to sweat out toxins, increases circulation. There's stuff out there on the web about both.
Hydrogen Peroxide brings oxygen into your cells and oxygen makes feeds your blood and thus you're operating more efficiently :)