The good bacteria are the unsung heroes of the show.

There are not enough good bacteria and too many bad bacteria.

Comment: I was given this while taking antibiotics to replenish the good bacteria in my body.

"The good bacteria are mixed in with the bad ones," Shi says.

When you take an antibiotic, it kills both good and bad bacteria in your body.

This will put the good bacteria back in your system and prevent many of these side-effects.

Most yogurt has at least a small amount of good bacteria in it, which may promote gut health.

Although research is not definitive, these good bacteria may help regulate digestion.

How could it do that without killing good bacteria?

The good bacteria are needed to crowd out the bad pathogens.