In a randomized clinical trial in Cuernavaca , Mexico , overweight and obese ( body mass index [ BMI ] 25 < 39 ) women , 18 - < 45 years old with an intake of sugar-sweetened beverages 250 kilocalories per day ( kcal/day ) were randomly allocated to the water and education provision group ( n = 120 ) or the education provision only group ( n = 120 ) .