WATER AS AN ESSENTIAL NUTRIENT: THE PHYSIOLOGICAL BASIS OF HYDRATION
Water intake was described and quantified in samples of urban Guatemalan schoolchildren stratified by gender and socio-economic status. The frequency of consumption and quantity of plain water drinking was estimated from oneday pictorial registries of all beverages, foods and snacks consumed over a 24-h period collected from 449 3rd and 4th graders from two social [...]