Most people understand energy as vitality and purpose, the opposite of being tired and sluggish. To have 'more energy' is top of everyone's list.
But, energy is also the food we eat which converts to glucose. This converts to energy in muscle cells - who are probably the most important energy 'customers'. Glucose when not needed by the body is stored and can convert to fat. To learn how to eat good foods see our Food Pyramid - click here