I am Very interested in your net search with regards to potassium and magnesium. I am post op lung resection-doing very well-AFTER- an iron deficiency was determined. My breathing is terrific now. I have gone on to develop palpitations and am now detremined to have High blood pressure. Also-my glucose tolerance is iffy. I have been put on propanolol-to reduce the blood pressure-and maybe get rid of this persistent pounding in my head. For the latter-it isn't working that well. Would you mind posting the links for your search? Thanks!