Understanding this simple equation is fundamental to losing weight. It is the basis of any good  weight loss program. What you have to understand is energy in versus energy out.

Our bodies need a constant supply of energy to function. We take in the energy stored in food and drink and then our bodies convert it into our own energy through the amazing biochemistry of digestion, nutrient transportation and energy metabolism.

• If we ingest the same amount of energy as we use each day, then we are in ‘energy balance’. Our weight remains stable.
• If we ingest more energy than our bodies can use, then we have a ‘positive energy balance’. We store the excess as fat. We gain weight.
• If we burn up more energy through normal functioning and physical activity than we ingest, then we create an ‘energy deficit’. Our bodies draw upon our fat stores to provide the extra energy. We lose weight.