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Asian Journal of Dairy and Food Research, volume 39 issue 3 (september 2020) : 201-206

Optimization of Sugar Reduction in the Formulation of Set-type Yogurt Using Pure Lactic Acid Bacterial Culture

Tasnia Umme Zahan, Md. Zakirul Islam, Md. Nurul Islam, Raihan Habib, Md. Harun-ur-Rashid
1Department of Dairy Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.
Cite article:- Zahan Umme Tasnia, Islam Zakirul Md., Islam Nurul Md., Habib Raihan, Harun-ur-Rashid Md. (2020). Optimization of Sugar Reduction in the Formulation of Set-type Yogurt Using Pure Lactic Acid Bacterial Culture. Asian Journal of Dairy and Food Research. 39(3): 201-206. doi: 10.18805/ajdfr.DR-163.

ABSTRACT

Background: Reducing the sugar content of processed products has been claimed to be one of the most efficient strategies for decreasing sugar intake. To investigate what level of sugar reduction is accepted in set-type yogurt, we conducted a hedonic test focusing on the sensory attributes and assessed the nutritional quality of the yogurt. 
Methods: We prepared a total of 12 set-type yogurt samples using four sugar concentrations (viz. 0, 4, 5 and 12%). The starter culture was used as a 1:1 ratio mixture of Streptococcus thermophilus and Lactobacillus bulgaricus. The sensorial, chemical and microbiological analyses were performed.
Result: From the investigation, yogurt containing at least 4 and 5% added sugar was found acceptable based on overall sensory score. On the hedonic scale, yogurt containing 12% sugar was more often described as too sweet compared with yogurt containing 4 and/or 5% sugar. On the other hand, the sweetness and aroma intensity for yogurt containing 0% sugar was judged as too low. The 4 and 5% added sugar yogurt was recorded highest with protein content 4.35 and 4.53%, respectively. The initial total viable count (TVC) of the yogurt made was found highest in 4 and 5% sugar yogurt each with » 5 log10 cfu/mL. These results indicate that consumers would accept set-type yogurts with 4 to 5% added sugar instead of 12 to 15%, but 0 to 3% sugar would be too low.

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