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Bacterial Cells
The human body has more bacterial cells than human cells, with trillions of bacteria residing primarily in the gut and skin, playing essential roles in digestion, immunity, and overall health.
According to the National Institutes of Health (NIH), thoroughly revised estimates show that the typical adult human body consists of about 30 trillion human cells and about 38 trillion bacteria.
Humans need bacteria and their genes more than most of us thought. One of the most important things microbes do for us is to help with digestion. The mix of microbes in your gut can affect how well you use and store energy from food.
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