 If the body does not quite manage to get the actual minerals and other nutrients to maintain the pH, it starts to steal that from structures such as bones and also from teeth. So we've also got to make sure that we get all of those key minerals in particular from our food so that we don't start pulling them out of key, big areas in the body such as the skeletal system. You will also just see there that we have a picture of the digestive system and you'll note that the stomach has a very low pH compared to the other areas of this system. And that's really there to make sure that that acid can break down that food. But as you'll see there are other areas where in fact we don't want acidity and we want to neutralise that instead.