According to the Los Alamos National Labs, hydrogen is the most abundant element in the universe. In fact, hydrogen makes up an estimated 90 percent of all atoms. In most cases, when you hear about hydrogen, it is usually in the context of outer space, military weapons or fuel sources for cars.

The use of hydrogen peroxide as a nasal spray is controversial. Some alternative medicine practitioners recommend its use; however, traditional medical texts argue against exposing mucous membranes to hydrogen peroxide.