Syneresis and apparent viscosity of the stored yoghurts changed
significantly with extended storage (Fig. 4). There was a tendency
that syneresis decreased but apparent viscosity increased with time
(during 1e14 days). The apparent viscosities of the samples at days
1, 7 and 14 were 1235; 1570 and 1629 mPa s, respectively, but
decreased to 1243 mPa s at day 21. This was in accordance with the
results of other researchers who used different fat replacers
including inulin (Guven et al., 2005) and b-glucan (Sahan et al.,
2008) in their studies. Polydextrose, at a suitably chosen level
(2 g/100 mL) used in the storage trial, is a soluble polysaccharide
capable of forming H-bonds with water.