Anu is absolutely correct. People seem to use weight loss and fat loss interchangeably, not understanding the difference between the two terms. Some diets and diet supplements claim to offer weight loss of 5 Kg or more, per week! But the truth is, these products are only offering WATER loss, not fat loss. And water loss is regained almost immediately. As a matter fact, the most FAT loss that the average body can sustain is about up to 1 Kg per week. The rest will be either water loss or a combination of muscle and water weight. So never target more than 1 Kg per week.