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Improving the stability of probiotic bacteria in model fruit juices using vitamins and antioxidants

Ding, W. K and Shah, Nagendra P and Fallourd, M. J and Leyer, G (2010) Improving the stability of probiotic bacteria in model fruit juices using vitamins and antioxidants. Journal of Food Science, 75 (5). M278-M282. ISSN 0022-1147

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Abstract

This study examined the survival of probiotic bacteria in a model fruit juice system. Three different strains of probiotic bacteria were used in this study: HOWARU Lactobacillus rhamnosus HN001, HOWARU Bifidobacterium lactis HN001, and Lactobacillus paracasei LPC 37. The probiotic bacteria were inoculated into model juice with various vitamins and antioxidants, namely white grape seed extract, green tea extract, vitamin B2, vitamin B3, vitamin B6, vitamin C, and vitamin E. The model juice without any additives was used as a control. Their viability was assessed on a weekly basis using plate count method. The model juice was made with sucrose, sodium citrate, citric acid powder, and distilled water and was pasteurized before use. Our findings showed that probiotic bacteria did not survive well in the harsh environment of the model fruit juice. However, the model juice containing vitamin C, grape extract, and green tea extract showed better survival of probiotic bacteria. The model juice containing grape seed extract, green tea extract, and vitamin C had the same initial population of 8.32 log CFU/mL, and at the end of the 6-wk storage period it had an average viability of 4.29 log CFU/mL, 7.41 log CFU/mL, and 6.44 log CFU/mL, respectively. Juices containing all other ingredients tested had viable counts of <10 CFU/mL at the end of the 6-wk storage period.

Item Type: Article
Uncontrolled Keywords: ResPubID19756, fruit juice, probiotic bacteria
Subjects: Faculty/School/Research Centre/Department > School of Biomedical and Health Sciences
FOR Classification > 0908 Food Sciences
SEO Classification > 8602 Dairy Products
Faculty/School/Research Centre/Department > Institute for Sustainability and Innovation (ISI)
Depositing User: VUIR
Date Deposited: 15 Nov 2011 01:31
Last Modified: 06 Feb 2015 01:53
URI: http://vuir.vu.edu.au/id/eprint/7412
DOI: 10.1111/j.1750-3841.2010.01628.x
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Citations in Scopus: 12 - View on Scopus

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