What type of organic compounds store the most energy? the least?

Answer:The body uses carbohydrates (glycogen) for medium-term energy storage and lipids (fats or triglycerides) for long-term energy storage. Carbohydrates store about 16 kJ/g, while fats store about 39 kJ/g. Gram for gram, triglycerides store more than twice as much energy as glycogen.