Spontaneously fermented curly kale juice: Microbiological quality, nutritional composition, antioxidant, and antimicrobial properties

Julia Szutowska , Iga Rybicka , Katarzyna Pawlak-Lemańska , Daniela Gwiazdowska


Nondairy fermented products, such as fruit and vegetable juices, are gaining popularity among consumers worldwide for health‐related and economic reasons. The purpose of this study was to determine the changes in microbiological quality; antimicrobial and antioxidant activity; and phenolic, vitamin C, minerals, and cadmium content occurring during spontaneous fermentation of curly kale juice. The fermentation process contributed to a significant growth of lactic acid bacteria, enterococci, and yeasts, while no pathogens of Escherichia coli and Salmonella spp. were observed. The antimicrobial properties of the obtained juice improved during fermentation for all indicator microorganisms. Total phenolic content and antioxidant activity increased from 48 to 116 mg gallic acid equivalent/100 mL and from 4.5 to 6.8 mM Trolox/100 mL, respectively, while the content of vitamin C decreased. The results indicated that 100 mL of juice provided a significant contribution to the recommended mineral intake. Moreover, the content of heavy metal Cd was within acceptable limit (6 µg/kg). Overall, our findings indicate that fermented curly kale juice may become popular in the functional food sector, especially among vegetarians and consumers with lactose intolerance or allergy to milk proteins.
Author Julia Szutowska (WT / KPPJ)
Julia Szutowska,,
- Department of Natural Science and Quality Assurance
, Iga Rybicka (WT / KTiAI)
Iga Rybicka,,
- Department of Technology and Instrumental Analysis
, Katarzyna Pawlak-Lemańska (WT / KTiAI)
Katarzyna Pawlak-Lemańska,,
- Department of Technology and Instrumental Analysis
, Daniela Gwiazdowska (WT / KPPJ)
Daniela Gwiazdowska,,
- Department of Natural Science and Quality Assurance
Journal seriesJournal of Food Science, ISSN 0022-1147, e-ISSN 1750-3841, (N/A 70 pkt)
Issue year2020
Publication size in sheets0.5
Keywords in Polishwłaściwości przeciwdrobnoustrojowe, właściwości antyoksydacyjne, jarmuż, sok fermentowany, minerały, witamina C
Keywords in Englishantimicrobial activity, antioxidant activity, curly kale, fermented juice, minerals, vitamin C
ASJC Classification1106 Food Science
URL https://onlinelibrary.wiley.com/doi/abs/10.1111/1750-3841.15080
Languageen angielski
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 29-07-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.991; WoS Impact Factor: 2018 = 2.081 (2) - 2018=2.416 (5)
Citation count*2 (2020-09-19)
Additional fields
UwagiFirst published:06 March 2020
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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