Eating less not equal to weight loss [news]

Eat less, weigh less. It turns out it's not quite that simple. Losing weight is simple in principle. The rule of thumb has been that if you cut out 2100 kilojoules a day - the equivalent of two large lattes or a blueberry muffin - you will lose about half a kilo a week until you reach that magic number on the scales. Simple - but, as it turns out, probably way too simple. It now appears that dietitians, doctors and others may have been getting it wrong all these years. There's a lot more to losing weight than just kilojoules in/kilojoules out. When you start to lose weight, your body slows down your metabolism. In other words, you use less energy for the same activities.