Doesn’t hurt to be aware of your blood sugar levels, including when experiencing any jitters. Can put to rest concerns re hypoglycemia. Easy to do at home yourself . . .
https://www.youtube.com/watch?v=D7dJt0pVmHM
You can get a glucometer starter kit for about $20.
An MD friend who was a magnesium researcher at one time in an academic setting relayed some useful insights: (1) A large portion of the population suffers from magnesium deficiency; (2) Standard serum blood tests for magnesium are nearly useless, miss lots of serious deficiency; (3) To reach and maintain adequate magnesium levels is best done by consistently, over the long term, taking smaller doses of magnesium, multiple times a day; (4) Taking a large dose of magnesium at one time results in almost all of it just getting dumped by the body; (5) It can take time and patience, over a year of careful supplementation, to resolve a deficiency; (5) The most commonly available magnesium formulation, i.e. magnesium oxide, is almost useless, very poorly absorbed though it is cheap; (6) Other formulations, including magnesium citrate and magnesium glycinate, are better absorbed.
A friend was recently having major symptoms of magnesium deficiency, including associated heart arrhythmias, and severe headaches. I inquired about magnesium, she was taking a significant daily dose of magnesium oxide, had for years. I sent her some links verifying what my MD researcher friend had mentioned, the poor bioavailability of magnesium oxide, only 4% absorbed!
https://europepmc.org/article/med/11794633/reload=0
“Bioavailability was measured as the increment of urinary maginesium excretion in normal volunteers given approximately 21 mEq/day of the test preparations. Results indicated relatively poor bioavailability of magnesium oxide (fractional absorption 4 per cent)”
With a better absorbed magnesium supplement, and patience, the suffering friend’s headaches have completely stopped, and the serious arrhythmias have subsided.
Mark Hyman MD has an article with a good overall perspective on magnesium and magnesium deficiency . . .
https://drhyman.com/blog/2010/05/20/magnesium-the-most-powerful-relaxation-mineral-available/