Acta Scientific Nutritional Health (ASNH)(ISSN: 2582-1423)

Review Article Volume 4 Issue 6

Water Kefir: A Review of its Microbiological Profile, Antioxidant Potential and Sensory Quality

Yuxin Cai, Anirudh Sounderrajan and Luca Serventi*

Department of Wine, Food and Molecular Bioscience, Lincoln University, New Zealand

*Corresponding Author: Luca Serventi, Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln, Christchurch, New Zealand.

Received: April 28, 2020; Published: May 29, 2020

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  Water kefir is a traditional beverage made from the symbiotic fermentation of kefir grains with sweetened water. Fruits such as apples, figs and kiwifruits can be used as flavouring agent or as source of fermentable sugars. Vegetables like pumpkin work similarly as fermentation substrate. This process is carried out at 25 - 30°C in anaerobic conditions, leading to a pH of 3.5 - 4.5 and alcohol content below 1%. The yeast strains mainly belong to Kluyveromyces and Saccharomyces. It is particularly rich in probiotics, such as the lactic acid bacteria Acetobacter spp., Lactobacillus acidophilus, brevis, casei, fermentum, helveticus, kefiri, kefiranofaciens parakefiri, lactis and Leuconostoc mesenteroides. In addition, yeast strains of Kluyveromyces lactis and Saccharomyces cerevisiae are typically present. These microorganisms are embedded in a matrix of kefiran, soluble fibre with hypocholesterolemic and hepatoprotective activities. Fermentation operated by kefir grains on fruit releases glutathione, organic acids and phenolic compounds, all of which act as antioxidants. Water kefir owes its distinctive sour aroma and flavour to lactic acid and alcoholic fermentation. Fruits and vegetables can provide nutrients such as amino acid, vitamins and minerals. Fermentation-induced hydrolysis of fibre releases sugars that lower kefir sourness in favour of sweeter notes.

Keywords: Fruits; Kefir; Lactic Acid Bacteria; Probiotic; Symbiotic Fermentation; Water

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References

  1. Fiorda Fernanda Assumpção., et al. "Microbiological, biochemical, and functional aspects of sugary kefir fermentation-A review”. Food Microbiology 66 (2017): 86-95.
  2. Zamberi Nur Rizi., et al. "The antimetastatic and antiangiogenesis effects of kefir water on murine breast cancer cells”. Integrative Cancer Therapies4 (2016): NP53-NP66.
  3. Ganguly NK., et al. "ICMR-DBT guidelines for evaluation of probiotics in food”. The Indian Journal of Medical Research 1 (2011): 22.
  4. Koh Wee Yin., et al. "Development of a novel fermented pumpkin-based beverage inoculated with water kefir grains: a response surface methodology approach”. Food Science and Biotechnology2 (2018): 525-535.
  5. Gulitz Anna., et al. "The microbial diversity of water kefir”. International Journal of Food Microbiology 3 (2011): 284-288.
  6. Martínez‐Torres Abigail., et al. "Inferring the role of microorganisms in water kefir fermentations”. International Journal of Food Science and Technology 2 (2017): 559-571.
  7. Kazakos Stavros., et al. "Production of low-alcohol fruit beverages through fermentation of pomegranate and orange juices with kefir grains”. Current Research in Nutrition and Food Science Journal1 (2016): 19-26.
  8. Laureys David., et al. "Investigation of the instability and low water kefir grain growth during an industrial water kefir fermentation process”. Applied Microbiology and Biotechnology7 (2017): 2811-2819.
  9. Cheirsilp Benjamas., et al. "Kinetic modeling of kefiran production in mixed culture of Lactobacillus kefiranofaciens and Saccharomyces cerevisiae”. Process Biochemistry 4 (2007): 570-579.
  10. Pothakos Vasileios, et al. "Acetic acid bacteria in fermented food and beverage ecosystems”. Acetic Acid Bacteria. Springer, Tokyo (2016): 73-99.
  11. Randazzo Walter., et al. "Development of new non-dairy beverages from Mediterranean fruit juices fermented with water kefir microorganisms”. Food Microbiology 54 (2016): 40-51.
  12. Rosa Damiana D., et al. "Milk kefir: nutritional, microbiological and health benefits”. Nutrition Research Reviews 30.1 (2017): 82-96.
  13. Adachi O., et al. "Acetic acid bacteria: ecology and physiology”. Eds. Matsushita K, Toyama H, Tonouchi N, and Okamoto-Kainuma A. Springer Japan, Tokyo (2016): 273-297.
  14. Laureys David, et al. "Bifidobacterium aquikefiri nov., isolated from water kefir”. International Journal of Systematic and Evolutionary Microbiology 66.3 (2016): 1281-1286.
  15. Laureys David and Luc De Vuyst. "Microbial species diversity, community dynamics, and metabolite kinetics of water kefir fermentation”. Applied and Environmental Microbiology 8 (2014): 2564-2572.
  16. Sabokbar Nayereh and Faramarz Khodaiyan. "Characterization of pomegranate juice and whey based novel beverage fermented by kefir grains”. Journal of Food Science and Technology6 (2015): 3711-3718.
  17. Schrezenmeir Jürgen and Michael de Vrese. "Probiotics, prebiotics, and synbiotics-approaching a definition”. The American Journal of Clinical Nutrition2 (2001): 361s-364s.
  18. Sharifi Mohammadreza., et al. "Kefir: a powerful probiotics with anticancer properties”. Medical Oncology 11 (2017): 183.
  19. Farnworth Edward R. "Kefir–a complex probiotic”. Food Science and Technology Bulletin1 (2006): 1-17.
  20. Witthuhn RC., et al. "Characterisation of the microbial population at different stages of kefir production and kefir grain mass cultivation”. International Dairy Journal 4 (2005): 383-389.
  21. Waldherr Florian W., et al. "Identification and characterization of a glucan-producing enzyme from Lactobacillus hilgardii TMW 1.828 involved in granule formation of water kefir”. Food Microbiology5 (2010): 672-678.
  22. Dertli Enes and Ahmet Hilmi Çon. "Microbial diversity of traditional kefir grains and their role on kefir aroma”. LWT-Food Science and Technology 85 (2017): 151-157.
  23. Kesenkaş H., et al. "Kefir”. Fermented foods in health and disease prevention”. Academic Press (2017): 339-361.
  24. Carasi Paula., et al. "Safety characterization and antimicrobial properties of kefir-isolated Lactobacillus kefiri”. Bio Med Research International (2014).
  25. Otles Semih and Ozem Cagindi. "Kefir: a probiotic dairy-composition, nutritional and therapeutic aspects”. Pakistan Journal of Nutrition2 (2003): 54-59.
  26. Rodicio Rosaura and Jürgen J Heinisch. "Yeast on the milky way: genetics, physiology and biotechnology of Kluyveromyces lactis”. Yeast5 (2013): 165-177.
  27. Wang Qi‐Ming., et al. "Surprisingly diverged populations of Saccharomyces cerevisiae in natural environments remote from human activity”. Molecular Ecology22 (2012): 5404-5417.
  28. Bourrie Benjamin CT., et al. "The microbiota and health promoting characteristics of the fermented beverage kefir”. Frontiers in Microbiology 7 (2016): 647.
  29. Diosma Gabriela., et al. "Yeasts from kefir grains: isolation, identification, and probiotic characterization”. World Journal of Microbiology and Biotechnology1 (2014): 43-53.
  30. Alsayadi Muneer., et al. "Antioxidant potency of water kefir”. The Journal of Microbiology, Biotechnology and Food Sciences6 (2013): 2444.
  31. Kesenkaş HARUN. "Antioxidant properties of kefir produced from different cow and soy milk mixtures”. Journal of Agricultural Sciences3 (2011).
  32. Sabokbar Nayereh and Faramarz Khodaiyan. "Total phenolic content and antioxidant activities of pomegranate juice and whey based novel beverage fermented by kefir grains”. Journal of Food Science and Technology 53.1 (2016): 739-747.
  33. Puerari Cláudia., et al. "New cocoa pulp-based kefir beverages: Microbiological, chemical composition and sensory analysis”. Food Research International2 (2012): 634-640.
  34. Dailin Daniel Joe., et al. "Bioprocess development for kefiran production by Lactobacillus kefiranofaciens in semi industrial scale bioreactor”. Saudi Journal of Biological Sciences4 (2016): 495-502.
  35. Pop Carmen., et al. "Fingerprint profiling of polysaccharide kefiran extracted from kefir grains biomass”. Journal of Agroalimentary Processes and Technologies2 (2015): 207-212.
  36. Shahabi-Ghahfarrokhi Iman, et al. "Effect of γ-irradiation on the physical and mechanical properties of kefiran biopolymer film”. International Journal of Biological Macromolecules 74 (2015): 343-350.
  37. Motedayen Ali Akbar., et al. "Development and characterisation of composite films made of kefiran and starch”. Food Chemistry3-4 (2013): 1231-1238.
  38. Beshkova DM., et al. "Production of volatile aroma compounds by kefir starter cultures”. International Dairy Journal7 (2003): 529-535.
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Citation

Citation: Luca Serventi., et al. “Water Kefir: A Review of its Microbiological Profile, Antioxidant Potential and Sensory Quality". Acta Scientific Nutritional Health 4.6 (2020): 10-17.




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