CFU/ml of Kefir

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This topic contains 1 reply, has 2 voices, and was last updated by  kirstyk4 7 years, 5 months ago.

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  • #70204

    ICanDad
    Member
    Topics: 7
    Replies: 19

    While waiting for my kefir grains to arrive, I am digging information about kefir.

    The first question I want to find is how many colony-forming unit (CFU) in kefir?

    Googling for a while, I found a wide range of answers, ranging from 10 Billion to 1 Billion of CFU/ml, but I am not sure how creditable these info are.

    A glass of 250ml kefir will have 2.5 trillion to 250 billion of probiotics?? I am not too convinced.

    I then finally found a research paper, which I think is more creditable and quite interesting.

    http://dx.doi.org/10.1016/j.foodchem.2004.04.021

    The result shows after 24 hours of fermentation, the number of lactobacilli and lactococc are in the order of 1E8 respectively. The author claims these findings agree with 5 other sources.

    If I am only looking at lactobacilli, it means a 250ml glass of kefir still contains 25 billions, which is not too bad.

    The author further investigate the effect of storage. They store the kefir at 5 degree for up to 28 days. And the finding shows the CFU starts dropping off from 7 to 14 days, from 1E8 to ~1E6.

    Conclusion:
    If you make your kefir fresh, each glass contains roughly 25 billion of good bacteria. If you want to put them in the fridge, you should consume them within 7 days, or the number of probiotics will decrease by 100 times.

    #70217

    kirstyk4
    Member
    Topics: 9
    Replies: 125

    Thanks for the great info!!

    I too just started making kefir with grains. Many of the websites I visited said that you could store your “grown” kefir for weeks in the fidge before it would go bad. I doubt I will ever be storing it that long. Any extra help we can get I am all for trying. 🙂

    Kirsty

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