Might search magnesium and post there.
I still think there is a lot to nutritional deficiency since most don't eat RDA and soil was reported severely depleted back in the 1930s. Seems like a bigger issue even if you have been depleted for a long while, you have to make it up while meeting current needs. Involved in thousands of enzyme reactions.
I wonder if what was pointed to in the article is an epigentic change based on diet... or drugs?!?http://drcarolyndean.com/2013/03/magnesium-is-not-dangerous/
Checking out the reMag from Dr. Dean soon. Her books are great.
My mag level dropped recently (in the blood, and when it shows there, it's pulling from tissue), but I had gotten my Vitamin D level up. Also started with occasional pain in chest and palpatations. Also detoxing mercury. Merc interferes with mag and enzyme reactions can be wacked out. Hmmm...