Water consumption increases weight loss during a hypocaloric diet intervention in middle-aged and older adults

Elizabeth A. Dennis, Ana Laura Dengo, Dana L. Comber, Kyle D. Flack, Jyoti Savla, Kevin P. Davy, Brenda M. Davy

Research output: Contribution to journalArticlepeer-review

156 Scopus citations


Water consumption acutely reduces meal energy intake (EI) among middle-aged and older adults. Our objectives were to determine if premeal water consumption facilitates weight loss among overweight/obese middle-aged and older adults, and to determine if the ability of premeal water consumption to reduce meal EI is sustained after a 12-week period of increased water consumption. Adults (n = 48; 55-75 years, BMI 25-40kg/m 2) were assigned to one of two groups: (i) hypocaloric diet 500ml water prior to each daily meal (water group), or (ii) hypocaloric diet alone (nonwater group). At baseline and week 12, each participant underwent two ad libitum test meals: (i) no preload (NP), and (ii) 500ml water preload (WP). Meal EI was assessed at each test meal and body weight was assessed weekly for 12 weeks. Weight loss was ∼2kg greater in the water group than in the nonwater group, and the water group (Β = 0.87, P 0.001) showed a 44% greater decline in weight over the 12 weeks than the nonwater group (Β = 0.60, P 0.001). Test meal EI was lower in the WP than NP condition at baseline, but not at week 12 (baseline: WP 498 ± 25kcal, NP 541 ± 27kcal, P = 0.009; 12-week: WP 480 ± 25kcal, NP 506 ± 25kcal, P = 0.069). Thus, when combined with a hypocaloric diet, consuming 500ml water prior to each main meal leads to greater weight loss than a hypocaloric diet alone in middle-aged and older adults. This may be due in part to an acute reduction in meal EI following water ingestion.

Original languageEnglish
Pages (from-to)300-307
Number of pages8
Issue number2
StatePublished - Feb 2010

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Nutrition and Dietetics


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