Drinking water enhances fat loss – there is no doubt about it. The space of this column allows me to provide a mere fraction of the research that explains why an adequate intake of water is so important for people who want to lose body fat, so I’ll provide you with the most recent evidence.

In a recent study, 14 healthy, normal-weight subjects (seven men and seven women), were used to assess the effects of drinking 500 milliliters (approximately 18 ounces) of water on energy expenditure, metabolism, and fuel utilization. The scientists assessed energy expenditure and metabolic rate by using whole-room indirect calorimetry – a highly accurate method of assessing changes in the metabolism.

Results showed that drinking 500 milliliters of water increased metabolic rate by 30%! The increase occurred within 10 minutes of consumption and reached a maximum after 30 to 40 minutes.

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Drinking water increases thermogenesis (calories expended via heat). About 40% of the thermogenic effect originates from the body warming the water from room temperature to body temperature.

In men, fat was the main fuel utilized during this process. In contrast, women tended to use carbohydrates to fuel thermogenesis.

The total thermogenic response to water consumption in this study was about 24 calories. Drinking 2 liters of water per day would augment energy expenditure by approximately 100 calories. If a person is on a calorie-restricted diet, this amount will add up as weeks go by to ensure better fat loss results.

Source: The Journal of Clinical Endocrinology & Metabolism

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How important is drinking water for fat loss?

by Paul Cribb Ph.D. CSCS. time to read: 1 min