Impact of pomegranate peel as prebiotic in bio-yoghurt
ISSN: 0007-070X
Article publication date: 21 May 2020
Issue publication date: 27 July 2020
Abstract
Purpose
The effect of pomegranate whole and inside peels before and after extraction of the tannic acid have been carried out in stimulated media and in gastrointestinal conditions
Design/methodology/approach
Adding pomegranate peels with and without tannins at different levels to bio-stirred yoghurt to study its effect as prebiotic, in addition to evaluating the effect on physiochemical, sensorial and rheological properties
Findings
The results reveal that pomegranate peels before and after removing tannins had no effect on the viability of a single strain of Lb. acidophilus in stimulated media, while the growth of mixed probiotic culture (Lb.acidophilus and Bifidobacterium bifidum) was enhanced when pomegranate peels (whole and inside part) free from tannins were used. Tannin-free pomegranate peels enhanced the viability of probiotic culture under gastrointestinal conditions. In this study, all probiotic cultures were maintained counts around log 8 cfu /g in stirred bio-yoghurt supplements with pomegranate peels after 21days. Bio-yoghurt supplemented with pomegranate peels at 0.5% gained high scores for overall acceptability.
Originality/value
Pomegranate has been recognized as a good source of antioxidant and antimicrobial activities. Some researchers have utilized pomegranate peel in fermented milk, but most of the studies have found that tannins inhibit the bacterial culture. This study recommended that the supplementation of low-fat bio-yoghurt with tannin-free pomegranate peels enhanced the texture properties, viscosity of the product, as well as the viability of probiotic culture during shelf life. Therefore, the tannin-free pomegranate peel could be used as a prebiotic in functional fermented dairy products.
Keywords
Citation
Ibrahim, A., Awad, S. and El-Sayed, M. (2020), "Impact of pomegranate peel as prebiotic in bio-yoghurt", British Food Journal, Vol. 122 No. 9, pp. 2911-2926. https://doi.org/10.1108/BFJ-04-2019-0296
Publisher
:Emerald Publishing Limited
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