So eventually it makes its way into our stomach. Now in our stomach we have a very low PH, a PH of about two. And so what that means is these bacterial cells will not be able to grow in our stomach. In fact, the majority of these bacterial cells will in fact die off, but some may actually survive. And when they pass into the small intestine, we know that in the small intestine the PH changes from acidic to basic. So in the stomach it's around two but in a small intestine it's around 8.5.