We're working on this too. Here's what we're doing:
Cut out phytic acid intake by:
or fermenting (like sourdough) all grains and beans.
Increase minerals by:
-Making and eating bone broth
-Eating a rediculous amount of vegetables AND the water they are cooked in.
-Eating grass-fed beef, lamb, and bison and free-range or pastured chickens.
-Take cod liver oil.
-Consider grinding own flour.
-Eat more eggs.
-Eat more grass-fed butter.
-Eat more milk products. (I am lactose intollerant, so I can't do as much of this as I would like.)
Fight cavity-causing bacterial population in the mouth by:
-Brushing 3x per day with xylitol.
-Eliminating or at least sharply limiting processed foods including white flour, white sugar, etc. If treats are eaten, brush afterwards.
We've got a little more time than you, so we're holding off on most supplements so far, but we'll consider more if this doesn't do enough to help.