Oral magnesium supplements do very little to raise your magnesium levels. I have tried transdermal magnesium and not had very good luck with it - it's oily and irritating to the skin. The angstrom magnesium, on the other hand, has been a miracle....my provider suggested 1 T twice a day. It tastes terrible, so I put it in a slug of chocolate coconut milk.
Angstrom minerals go right into your bloodstream, so there's not the gastric issues that other magnesium supplements can cause. This stuff has been life-changing.
My source is a bit cheaper than this....freepmail me and I will send you the website.
I believe the ionic forms of magnesium are easily absorbable.
Magnesium Chloride, Magnesium Citrate, Magnesium Ascorbate, Magnesium Acetate, Magnesium Sulfate (epsom salts).
But Magnesium Oxide, Magnesium Hydroxide, and Magnesium Carbonate will go through you like stuff through a goose!!
Not a diuretic... more like a diarhetic!!