acids are not the cause, they are the product of oxidation. oxidation comes from excess of oxygen, which comes from the metabolism of sugars, by both our cells and by yeasts and other organisms inside us.

the oxidation and the acidity combine with catalytic metals like lead and titanium and many other things like this to cause DNA and cell damage.

this is only part of it too. fluoride messes up the function of the hormone system especially thyroid, and it interferes with the natural cell death process, which combined with sugar leads to tumors.