Which molecule stores the most energy?

There are two types of energy-storing molecules, long term and short term. ATP is the most common short-term energy molecule (the energy is store in the phosphodiester bonds). There are four long term energy storge molecules, which are much larger than ATP. They are lipids, proteins, carbohydrates, and nucleic acids. Among them, lipids are the main energy storing molecule in the body. Lipids are mainly composed of hydrocarbons in their most reduced form.