Question

What is the use of bacteria in the human body????

Answer 1

They help us digest our food , the good bacteria you hear about does this .

Answer 2

I little expansion on this will be helpfull , I hope .
When you see things advertised as probiotic , or containing good bacteria such as acidophilus , imunitas ect , they are designed to aid digestion .

Some ecoli ( the beneficial ones can turn bad and starting causing major problems when they mutate from good ecoli - they can start to eat you !

Beneficial bacteria are sometimes called flora when people talk about the good ones that aid digestion .