Our expert says:
The only way to lose weight permanently is to decrease your energy intake by using an energy-reduced, low-fat diet and to increase your energy output by doing daily exercise. Drinking large volumes of water without reducing your energy intake will not cause weightloss. Drinking too much water can in fact be dangerous and counterproductive. If you drink more than 2,5 litres of liquid (this includes all beverages, not just water) a day (the adult requirement), then you can cause electrolyte imbalances and wash important minerals like potassium, sodium, magnesium and calcium out of your body which can even be fatal (some of the Comrades Marathon runners have succumbed). Electrolyte imbalances can ironically cause water retention so that you will weigh more. Water stored in the body increases weight, but not body fat content.
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