The advice to drink water on an empty stomach to help lose weight is worthwhile, given the crucial role water plays in various body functions. Water constitutes 60% of body weight, and is necessary for transporting nutrients, eliminating waste, metabolism, and maintaining the integrity of the body’s systems, including the nervous system and muscles.

The main functions of water include:

Nutrient Transport: Transporting essential nutrients to the body.
Waste transportation: Assistance in the disposal of bodily waste.
Metabolic Support: Acts as a means of dissolving vitamins, minerals, sugars and amino acids necessary for energy production.
Reducing friction: creating a slippery material that reduces friction between different parts of the body and absorbs shocks.
Temperature regulation: Facilitating the regulation of body temperature through secretion of sweat and absorption of heat.
Blood volume maintenance: supplying blood with volume to prevent hypotension.
Consequences of dehydration include symptoms such as fatigue, weakness, and loss of appetite, and if not treated, can lead to serious complications and death. To prevent dehydration, it is necessary to keep the body adequately hydrated, and doctors recommend drinking at least two to three liters of water daily.