In the study, the most improvement in viscosity was obtained in the ice cream mix containing 6% milk fat and WPI (P <0.05) (Table. 3).Therefore, viscosity tended to increase with the rise of fat content from 3 to 6% in mixes containing WPI. Similarly, Prindiville et al. [ 25 ] Found that viscosity increased in ice cream mixes containing Simplesse and polydextrose as a fat replacer with the rise of fat content but the exception that reduced fat one that was inexplainably more viscous than full fat.The non-fat and low-fat mixes containing both fat replacers were found to have lower viscosities than full fat mixes.The viscosity values did not vary between the samples of regular ice cream and reduced-fat or low-fat ice creams containing inulin. Niness [ 13 ] Reported that unlike other fibers, inulin has no "off flavours" and may be used to add fiber without contributing to viscosity. But, in milk beverages, chain length and concentration of inulin were found to be effective in viscosity. No significant differences in viscosity were found between whole milk and skimme milk samples containing 4 or 6% long chain inulin [. 26 ]. In contrast to our findings, addition of 5% inulin to low-fat yog-ice cream mixes was shown to increase the viscosity in comparison to regular fat control mix [. 16 ].Substitution of inulin for 42 DE corn syrup also increased the viscosity in reduced-fat ice cream mix [. 17].However, substitution of polydextrose [ 27] or modified starch [ 28 ] To milk fat significantly decreased viscosity in low-fat and free fat ice creams.
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