Improving chemical, rheological and sensory properties of commercial low-fat cream by concentrate addition of whey proteins

Abstract

The present study was conducted to determine the effect of whey protein concentrate (WPC) addition on the commercial low-fat cream's chemical, rheological and sensory properties. WPC was added to the low-fat cream (10% fat)   in ratios of 1.0, 2.5, and 5.0% to represent the treatments C1, C2, and C3, respectively.In addition, a fat-rich, positive control treatment (C +) with a fat percentage of 30% and a negative low-fat control treatment (C-) with a fat percentage of 10% were investigated without adding WPC. Chemical tests were carried out, including the percentage of moisture, protein, fat, carbohydrates, total acidity, and pH, as well as rheological tests that included; hardness, springiness, and Cohesiveness. Also, a sensory evaluation was conducted. The results showed a decrease in the moisture percentage of the added treatments with the increment of the added WPC quantity. Also, a decrease in the fat percentage and pH of the WPC addition treatments was observed, combined with an increment in the percentage of protein, carbohydrates, ash, and total acidity. Regarding the microbiological properties, no bacterial or mycological contamination was observed during the manufacturing and storage periods. The results also showed the improvement of rheological and sensory characteristics by increasing the percentage of WPC addition compared with the positive and negative control treatments. The present study would be helpful in the production of low-fat cream fortified with whey proteins with high nutritional value.