A proboscis monkey can stomach mangrove leaves thanks to friendly bacteria.

It's also packed with protein, potassium, and friendly bacteria that keep the gut healthy.

An imbalance in the friendly bacteria that help break down food can cause vitamin or mineral deficiencies.

One approach already in use is probiotics, the idea that friendly bacteria fed to cattle will displace O157.

Antibiotics can also reduce friendly bacteria in the body.

The higher the dose, the longer their remission - good evidence that the friendly bacteria were effective.

More sweat on our skin means more food for the friendly bacteria that make their home there.

It is also thought the friendly bacteria found in many types of yogurt can help prevent and even remedy diarrhea.

By peristalsis, the mixture is sent to the intestine where friendly bacteria continue chemical breakdown.

Here it is fermented by the large number of friendly bacteria, leading to gas production and painful cramps.