I ordered a multi-pack of Trace Minerals Mega-Mag, and I find that I can't take very much by mouth without an unwanted antacid effect (100mg/day tops). The upside is these will last a very long time, but the downside is I have a whole bunch of it sitting around taking up cupboard space, and not making it into my system.
I also use magnesium oil transdermally, but I'm wondering if this might be more readily absorbed given it's ionic nature.
asked byHappy_Now (24553)
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on September 20, 2011
at 11:28 AM
All forms of magnesium, aside from pure metal, are ultimately ionic. That is, Mg forms a +2 cation and bonds to -1 or -2 cations. Magnesium chloride is MgCl2, magnesium oxide is MgO, magnesium citrate is . I suspect the bioavailability of various salts is more related to the solubility of the salt (so it dissociates/breaks apart to Mg+2 ions and whatever -2 or -1 ions) and/or the interaction between the associated anions with other minerals. MgO is not very water soluble while citrate is.
Heck, why suspect, I came across this looking for the solubility of Mg citrate (the form I take) : Magnesium oxide was virtually insoluble in water and only 43% soluble in simulated peak acid secretion (24.2 mEq hydrochloric acid/300 ml). Magnesium citrate had high solubility even in water (55%) and was substantially more soluble than magnesium oxide in all states of acid secretion. From: http://www.ncbi.nlm.nih.gov/pubmed/2407766