Tag: Hydrogen energy

Gram for gram, the energy density of substances varies dramatically across different physical and biological processes, with fats providing the most calories among nutrients, while nuclear reactions release orders of magnitude more energy from the same mass. The answer to which substance is the most energy-dense depends entirely on the scale of energy release being considered.

While the body's macronutrients offer different energy levels, fats are the most calorie-dense, providing about 9 calories per gram. But beyond biological molecules, the answer to which contains the greatest amount of energy per gram lies in the realm of nuclear physics, where mass is converted into staggering amounts of energy.