Honestly I don't know. I assume acidic foods of any kind. But our bodies are designed to eat plenty of acidic foods, so that is why I don't think demonizing aci

Honestly I don't know. I assume acidic foods of any kind. But our bodies are designed to eat plenty of acidic foods, so that is why I don't think demonizing acid is the solution. A few stories I heard a long time ago was babies having their front teeth eaten away because their parents gave them fruit juice in a bottle or sippy cup all the time. So anything that is over done, where the body can't balance the ph on it's own, would be bad. But going too alkaline can be bad also I'd imagine.