In other words, 1) the probiotic microorganisms must be alive when you consume them; 2) the dosage must be high enough to have an effect; and 3) there has to be a beneficial physiological effect. All three things are needed in order to call bacteria probiotic. At present, most probiotic bacteria belong to the Lactobacillus or Bifidobacterium genera.
Your body contains around 100 trillion bacteria
As humans the number of bacteria living in and on us outnumber our human cells. The human species consists of approximately 37 trillion human cells, but the number of microbes is around three times higher, i.e., 100 trillion.
We refer to all these bacteria as “the microbiome.” Not surprisingly, the microbiome plays a major role in our wellbeing as it interacts with our body. Most of our bacteria live in the intestine, and you will therefore sometimes hear the term “gastrointestinal microbiota.” Much scientific research is taking place in the area of our microbiota and the role that probiotics may play.
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