The restriction of enzyme hydrolysis is due to the strong bonding
forces within starch granules and the high crystallinity degree
of the banana starch granule. Moreover, banana starches appear to
be highly resistant to enzymatic hydrolysis due to the presence of
an external thick layer (7 lm) of larger blocklets (Gallent, Bouchet,
Buleon, & Perez, 1992). According to Malleshi (2004), polyphenols
will bind with amylases and slow down the carbohydrate digestibility
of the sample. Consequently, it is believed that the higher
contents of phenolic compounds in 30BFG and 30BFN than in the
conG and conN caused the slower digestibility rate in BF-incorporated
noodles.