This aspect was supported by an explanation given by
Tamime and Robinson (1999). In addition, it was explained for guar
gum, LBG and XG (as neutral hydrocolloids) that the lower apparent
viscosity vs unstabilized yoghurt at their low concentrations
(where the aggregate structure of caseins is becoming more
compact) was in agreement with a model of depletion offlocculation of aggregates. Further increases in the stabilizer concentration will trap the compact casein aggregates in a viscous
polysaccharide continuous phase (Everett & McLeod, 2005). This
phenomenon, in turn, will cause fewer available casein aggregates
to electrostatically and hydrophobically interact among themselves, thus yielding the weaker and less firm protein gel.