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Addition of grape pomace extract to probiotic fermented goat milk: the effect on phenolic content, probiotic viability and sensory acceptability
Author(s) -
dos Santos Karina MO,
de Oliveira Isabel C,
Lopes Marcos AC,
Cruz Ana Paula Gil,
Buriti Flávia CA,
Cabral Lourdes M
Publication year - 2016
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.7836
Subject(s) - lactobacillus rhamnosus , food science , pomace , probiotic , lactobacillus acidophilus , fermentation , chemistry , polyphenol , lactobacillus , antioxidant , biology , bacteria , biochemistry , genetics
BACKGROUND Grape pomace is a source of phenolic compounds, which are associated with health benefits in humans. Additionally, fermented dairy foods with probiotics can be good vehicles to deliver these bioactive compounds. The effects of the addition of grape pomace extract ( GPE ) on the total phenolic ( TP ) content, physico‐chemical characteristics and viability of Lactobacillus acidophilus LA ‐5 or Lactobacillus rhamnosus HN001 in fermented goat milks prepared with grape juice were investigated. RESULTS The TP concentration increased significantly in fermented milks with the addition of GPE . A protective effect of GPE on the viability of L. acidophilus was observed. However, after 14 days of storage, the populations of L. acidophilus were significantly lower when compared with those of L. rhamnosus , and only the last probiotic maintained its viability above 7 log CFU mL −1 throughout the period investigated. The sensory scores of flavor, color and overall acceptability of the fermented milk containing L. rhamnosus HN001 were significantly increased when GPE was added. CONCLUSION The use of GPE might increase the functionality of probiotic fermented goat milk processed with L. rhamnosus HN001 and grape juice because grape polyphenols are known for their antioxidant properties and positive effect on the modulation of gut microbiota. © 2016 Society of Chemical Industry