On the other hand, the decreases in absolute calcium concentrations
are not the reason for its reduced bioavailability, because the
mineral bioaccessibility or bioavailability shows no necessary relationship
with its concentration in sample matrix (Briones-Labarca,
Venegas-Cubillos et al., 2011; Vitali et al., 2008). Usually, germination
favors obvious removal of phytic acids, thus expecting an
improved calcium bioaccessibility. Nevertheless, GBR-HP0 was
lower than SBR-HP0 in calcium bioaccessibility (Fig. 1B). It was
consistent with the results of Wang et al. (2015), who observed a
decreased calcium bioaccessibility after germination for soybeans
and mung beans. It was hypothesized that the released calcium
from phytate could be re-binded to other components in germinated
samples, because calcium is closely associated with protease
activity and cell membrane functionalities. HHP-treated samples
showed the statistically higher calcium bioaccessibility than
GBR-HP0, suggesting that HHP could improve calcium in vitro
bioaccessibility in GBR