Research suggests that drinking water increases the rate at which calories are burned by boosting the metabolism, notes WebMD. Drinking water before meals also decreases the appetite, resulting in fewer calories being consumed.
Researchers estimate that those who increase their water intake by 1.5 liters daily burn approximately 5 pounds of weight throughout the course of one year. A study conducted at Berlin's Franz-Volhard Clinical Research Center revealed that the metabolic rates of men and women increase by 30 percent within 10 minutes of water consumption, and the metabolic rate reached its maximum within 30 to 40 minutes. The study also revealed that the increase in metabolism was due to excess fat burning in men and an increased breakdown of carbohydrates in women. The idea that drinking excess water flushes fat out of a person's system is a myth, according to WebMD.
Substituting water for other beverages can also help individuals significantly decrease the amount of calories they consume per day. Single cups of milk, coffee, punch and even fruit juice can add hundreds of calories per day to a person's diet, explains the Centers for Disease Control and Prevention. Consuming water throughout the day and abstaining from all other beverages can contribute to weight loss.