Starch type affects the structural and digestibility properties of OCSNPs, OPtSNPs, and OPSNPs, with the most obvious effect observes for OPtSNPs. Abstract This study characterizes the digestibility properties and structural changes of octenyl succinic anhydride (OSA) modified starch nanoparticles (OSPNs) from corn, potato, and pea starches (codes as OCSNPs, OPtSNPs, and OPSNPs). After OSA modification, the average particle size and degree of substitution of OSPNs significantly (p < 0.05) increase compared to control samples, whereas the apparent amylose content, R1047/1022, relative crystalli...