Relative porosity determined from the data of bulk density and true density, showed no statistically signifi- cant difference (p >0.05) between formulations and control. Nunes and Moreira (2009) concluded that sugar uptake in mango chips led to a firm structure, low porosity and loss in elasticity for mango chips. Ajila et al. (2008) reported that biscuits with mango fiber added showed an increase in water absorption, which resulted in decrease of biscuit porosity.