[sour grapes]

Oddly enough dentists are saying tooth enamel erosion has become a big problem with this generation of people. It came unexpected as previous generations did not have this problem. Somehow the North American diet has introduced various acids -especially in soft drinks, fruit juices and also foods. Swimming in chlorinated water is also a culprit. Once the enamel wears off there is nothing that can bring it back -- and teeth become sensitive and brittle. Especially those taking apple cider vinegar have to be very careful - best to use a straw. A lot of fruits also have a lot of acid.