Terry, I did a google on Potassium and Anxiety and I got pages of hits, read through a few, but internet access at work lately has been the pits. It sounds like it might be a definite possibility though. Magnesium deficiency was also mentioned.

I agree with Roz on the rice - for some it's not 'all grains' but specifically gluten that is the problem. Rice, oats and gluten free products might not be a problem for her.

HTH
Nat