Does drinking more water aid in weight loss among patients with obesity?

Updated: Jun 09, 2021
  • Author: Osama Hamdy, MD, PhD; Chief Editor: Romesh Khardori, MD, PhD, FACP  more...
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Dennis et al found that in overweight and obese middle-aged and older adults on a hypocaloric diet, drinking water before each main meal aided weight loss. In 48 adults aged 55-75 years with a BMI of 25-40 kg/m2, those who consumed 500 mL of water prior to each daily meal had a 44% greater decline in weight over 12 weeks than did individuals on a hypocaloric diet without premeal water consumption. [136]

Water drinking could assist weight loss in overweight children. Drinking 10 mL/kg of cold water could result in an additional weight loss of about 1.2 kg/y. This is achieved primarily through a water-induced increase in resting energy expenditure. [137]

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