Your body creates chemical energy from the food you eat, which contains carbohydrates, lipids, and proteins. These are large molecules that first need to be broken down into simpler molecules, such as monosaccharides, C₆H₁₂O₆; fatty acids, C₁₄H₂₈O₂; and amino acids, C₂H₅NO₂. Of these molecules, which has the greatest supply of hydrogen atoms per molecule? Which is the most reduced in terms of having the least number of oxygen atoms per carbon atom? Which can react with the most oxygen molecules to produce the most energy? Which provides the most dietary Calories per gram?