A drink for moderating blood glucose levels produced by a meal in a human subject suffering diabetes or impaired glucose tolerance (IGT) the drink comprising: at least one water soluble or water dispersible compound selected from the group consisting of amino acids, peptides and proteins in a total amount of at least 8g on a dry weight basis per serving of drink; aqueous liquid in an amount of from 70 ml to 400 ml (preferably in an amount of from 100 ml to 250 ml and more preferably from 125 ml to 175 ml) per serving, and wherein the drink exhibits shear banding when subject to the shear banding test herein described.