Smoothing the yoghurts led to different viscosity profiles
depending on the starter, starch addition, and storage period in
comparison with the set yoghurts (Fig. 2b). The stirred yoghurts
had a significantly lower apparent viscosity (2.88 ± 0.06 Pa s) than
the set yoghurts did (4.67 ± 0.06 Pa s). The addition of starch led to
an increase in apparent viscosity values for the stirred yoghurts.
The apparent viscosities of the stirred yoghurts fermented with the
control, LB2, and ST1 starters did not vary significantly or varied
only slightly during the storage period, irrespective of starch
addition. However, higher apparent viscosity values were
measured during the storage period for the stirred yoghurt fermented
with the LB1 starter, regardless of starch addition. As
generally observed in set yoghurt, the stirred yoghurt fermented
with the LB1 starter had the significantly highest apparent viscosity
value.