Re: Magnesium? how much would be too much? Self experimentation :)
Regarding blood pressure, a little something called thiocyanate is a natural blood pressure reductant. Professor Wilder Bancroft of Cornell ate a gram of thiocyanate for somthing like 20 years, in order to prove its safety. You may want to look him up.
More importantly from my standpoint is how to get thiocyanate into me. Easy. I just eat foods which contain cyanogenic glycosids, like apple seeds, apricot pits, cassava, millet. I prefer apricot pits. There is an enzyme in the body that converts the glycosides to thiocyanate, which then naturally reduces blood pressure.
I'd be flattered if you believe me, but it would be beteter if you did a little research on your own, since I have made at least one mistake in the past. The bodily enzyme that converts the glycosides to thiocyanate is called rhodanese. I eat about 16 apricot pits daily, in two separate 8-pit servings. Bitter as all hell at first, when I began I would eat them with an Almond Joy candybar since they appear identical to almonds. Then I got used to them, as I myself became more bitter (just kidding)
As a rule, I never eat any magnesium or calcium supplements other than IP6 or chlorophyll, which chlorophyll I get from eating leafy vegetables, Kale and green beans being my favorite.
Some discuss cyanogenic glycosdes in terms of their cancer-fighting effects, but I'm not concerned with that. Rather, I'm only concerned with the blood pressure reducing effect, for myself.
Funny thing, is that if you tell someone to eat apricot pits instead of a beta blocker, they'll never believe you, at least in my experience. Who'd believe a Nut anyway ?
But for you, maybe one good Nut, deserves another.