FADH2

FADH₂ is a molecule that acts as a carrier of energy in the cells. During processes like breaking down nutrients for energy, FADH₂ is produced and stores electrons, which are tiny particles that carry energy. This stored energy is later used in the cell’s energy factory, called the electron transport chain, to produce ATP—the main energy source for the body. Think of FADH₂ as a battery that holds electrons until the cell needs to generate power. It’s an essential part of the body's way of converting food into usable energy.