Food energy is chemical energy that animals derive from their food to sustain their metabolism, including their muscular activity.
The nutritional information label on a pack of Basmati rice in the United Kingdom
A carbohydrate is a biomolecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms, usually with a hydrogen–oxygen atom ratio of 2:1 and thus with the empirical formula Cm(H2O)n, which does not mean the H has covalent bonds with O. However, not all carbohydrates conform to this precise stoichiometric definition, nor are all chemicals that do conform to this definition automatically classified as carbohydrates.
Grain products: rich sources of carbohydrates
Glucose tablets