Fructooligosccharides (FOSs) were produced by Bacillus subtillis natto.
Edible films were obtained from a mixture of cassava starch and FOSs by casting.
FOSs acted as a plasticizer in starch films, decreasing the glass transition temperature.
FOS addition increased the solubility and elongation of starch films.
FOS addition decreased the water vapor permeability of starch films.