FOOD. Science. Technology. Quality

Food. SCIENCE. Technology. Quality

Food. Science. TECHNOLOGY. Quality

Food. Science. Technology. QUALITY

Authors

GENOWEFA BONCZAR, KRZYSZTOF MACIEJOWSKI, JACEK DOMAGAŁA, DOROTA NAJGEBAUERLEJKO, MAREK SADY, MARIA WALCZYCKA, MONIKA WSZOŁEK

Title

Effect of probiotic starter cultures on cholesterol level in fermented milk drinks

Abstract

Fermented drinks were produced from pasteurized cow’s milk inoculated using the following DVS starter cultures: YC-180 (Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus), YO-MIX 207 (Lactobacillus delbrueckii subsp. bulgaricus, Streptococcus thermophilus, Lactobacillus acidophilus, Bifidobacterium lactis), LA-5 (Lactobacillus acidophillus), and BB-12 (Bifidobacterium bifidum). In the milk and in the fermented milk drinks made from it and stored for 1 and 14 days, the following was determined: content of fat, pH value,, titrable acidity, and cholesterol level using an enzymatic method with a cholesterol oxydase. The pasteurized milk contained 20.0 mg/100 g of cholesterol on average, whereas its fat contained 5.64 mg/g of cholesterol. Compared to the milk, in the produced one-day old milk drinks fermented using YC-180, YO-MIX 207, LA-5 and BB-12 starters, a statistically significant (p ≤ 0.05) reduction was found in the level of cholesterol; it amounted to, respectively: 49.4 %, 41.3 %, 44.8 %, and 45.9 % of the initial content of cholesterol in 100 g of milk and to, respectively: 54.9 %, 44.3 %, 46.3 %, and 48,0 % in 1 g of milk fat. The starter cultures applied differed in their capacity to decrease the content of cholesterol: the capacity of YO-MIX 207 inoculating culture was the strongest, whereas that of YC-180 was the weakest. During chilled storage of drinks for 14 days, a further decrease was reported in the cholesterol level in the drinks and in their fat: 15 % on average.

Keywords

milk, starter cultures, fermented probiotic drinks, cholesterol

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