The formation of particle mucilage bonds with dicalcium phosphate dihydrate and starch mucilage binder reduces the B.E.T. nitrogen adsorption surface are from 196 to 0.96 m2 g-1. The maximum reduction (40%) of granule surface area at a binder concentration of 10% w/w corresponded to similar optima in friability, compressability and median granule size. Surface and pore-void structural analysis by mercury intrusion could not discriminate between pore-void sizes in the range 0.5-100 nm. Nitrogen adsorption measurements showed, however, that the microporous surface area decreased from 0.3 to 0.18 m2 g-1 as binder surface coverage increased over the concentration range 2 to 20% w/w starch mucilage.