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1)they digest cellulose for us.

2)they compete with other bad bacteria

3)they compete with bad fungi microbes

4)we discovered penicillin first through a theory that the penicillin mold evolved to produce a chemical to combat bacteria in its environment.

5)they produce some vitamins in your large intestines you cannot get in enough quantities from food alone, except vitamin dietary supplements, which are vital to health.

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16y ago

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