Gymnema inodorum (G), a vegetable widely used in a Northern Thai food, is known for not only its health nourishing effect, but also its hypoglycemic effect. But no scientific evidence on the hypoglycemic effect of Gl has ever been reported in human. ln this study, the effect of Gl consumption on peak plasma glucose concentrations in healthy subjects was investigated. Either oral glucose load (75 g) or standard meal was given to the subjects with respect to the presence or absence of Gl consumption and postprandial peak glucose levels were compared.