Energy balance

  It is the balance between energy taken in, generally by food and drink, and energy expended

 Energy expenditure is influenced by:

 * genetics

, * body size 

, * amount of muscle

, and physical activity

. * thermal effects of food (different foods generate different amounts of energy when you eat them)  While calories are probably the most critical element in maintaining your energy balance, other 

factors in your diet such as:

 * how much fiber or calcium in diet may influence  energy expenditure

 and

 *how much muscle and fat the body have.