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Clinical Trial Summary

This study is a randomized controlled intervention trial in adults aged 50+ years with overweight or obesity, which will compare three groups with different diet prescriptions: 1) pre-meal water consumption (500 ml, before each main meal) with a hypocaloric diet; 2) 1500 ml water consumed throughout the day with a hypocaloric diet; 3) hypocaloric diet with no instructions regarding water consumption. Smart water bottles will objectively assess water intake timing and volume. Urine osmolality, urine volume, and serum osmolality will be used as objective indicators of compliance with the water intake prescription. We will investigate changes in perceived hunger and fullness and appetite-regulating hormones as potential mechanisms by which premeal water could improve appetite regulation. We will also investigate the impact of water consumption and hydration on executive function capabilities, which may influence intervention adherence. Although increasing water intake could be an effective weight management strategy, no evidence-based recommendations exist for the timing of water intake needed for this benefit.


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT05843318
Study type Interventional
Source Virginia Polytechnic Institute and State University
Contact Brenda Davy, PhD RDN
Phone 540-231-6784
Email bdavy@vt.edu
Status Recruiting
Phase N/A
Start date November 13, 2023
Completion date March 31, 2028

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