what is a nutrient that helps release energy stored in other nutrients is called a?

A nutrient that helps release energy stored in other nutrients is called a coenzyme. Coenzymes, often derived from vitamins, assist enzymes in catalyzing biochemical reactions, particularly those involved in metabolism. They play a crucial role in converting carbohydrates, fats, and proteins into usable energy for the body. Examples of coenzymes include NAD (nicotinamide adenine dinucleotide) and FAD (flavin adenine dinucleotide).