Curious about losing weight within 7 days? Then let's dive more into this method. This is a method in which people only consume water without eating anything for a fixed duration in order to lose weight naturally without having to use any pills. This method is said to be the fastest way to lose weight. It is a calorie-less diet which does not include any intake of food. That's what has made it trending among people as it is natural and doesn't cause any side effects.