Benefiber was chosen for this study for several reasons. First, it is partially-hydrolyzed guar gum (PHGG), and it completely dissolves in water making a clear solution. Second, other fibers are usually viscous, and thus not suitable for use in ORS; the amylase-resistant starch is not soluble and it only makes a suspension. Third, in in vitro studies of fermentation, using fresh faecal inoculate, SCFAs production was observed to be highest with PHGG in comparison with the other commercial fiber substitutes (40). Fourth, in our study in non-cholera diarrhoea in children, we observed PHGG to be clinically useful (36). In this study (36), we used PHGG in a dose of 20g/L. This dose was selected arbitrarily on the basis of standard dose used in the preparation of liquid formulation diets. In the proposed study, we would like to test two different doses (25 g/L and 50 g/L) to determine if there is an additional benefit of increasing the dose.