Interesting that the calcium build-up on my teeth seemed  to be reduced,  but then I end up with kidney stones.

Lex, Peter at HyperLipid actually discusses this in his latest post.  He thinks that high-carb diets result in many people having asymptomatic kidney stones...asymptomatic, because they are too large to enter the urethra.

But correct the diet and they begin to dissolve, eventually shrinking to the point where they will fit into the urethra, thus becoming symptomatic (causing excruciating pain.)