@
cigana
That's very interesting, regarding the short concentrated doses of magnesium having a better effect on you, presumably due to creating high transient elevations in blood magnesium levels.
I guess that the highest transient blood magnesium elevations are going to achieved by
magnesium sulfate injection — something I have never tried, but I understand Dr Sarah Myhill uses this on her ME/CFS patients, often to good effect. Though apparently magnesium sulfate is painful when injected, and also I read that MgSO4 is a bit rough on the veins themselves, which would concern me.
I used to use magnesium primarily for its
anti-anxiety effect (at one point I had severe generalized anxiety disorder), and found that oral magnesium at a doses of 400 mg (the maximum my bowels seem to be able to take) did very little for my anxiety, but applying magnesium oil (or concentrated magnesium sulfate solution) transdermally to my skin from head to toe had a pretty noticeable anti-anxiety effect.
Though I imagine that transdermally applied magnesium is absorbed plentifully, but quite slowly over several hours. I certainly noticed that it would take a good 3 to 4 hours for the anti-anxiety effects of transdermal magnesium to kick in, indicating that transdermal magnesium is absorbed relatively slowly from the skin.
Note however that the anti-anxiety benefits of magnesium are probably mediated by its antagonistic effects on the NMDA receptors in the brain, which is a different mechanism to the one we are discussing this thread, namely getting magnesium into cells, and into mitochondria.
One interesting method of administration Dr Myhill mentions on her website is
rectal administration. Here you dissolve 250 grams of magnesium sulfate in one liter of water, and then this solution will have 600 mg of elemental magnesium per 20 ml of liquid. To administer, you load 20 ml of this solution into a syringe, push the syringe into the rectum, and squeeze in the liquid, which gives you a 600 mg dose of magnesium.
I should think that rectally administered magnesium will be absorbed pretty rapidly, and therefore will achieve high transient elevations in blood magnesium. The last time I tried rectal administration, though, it gave me diarrhea. But in my case, I have IBS-D, so unfortunately many things tend to precipitate diarrhea in me (if I have a glass of wine, or a mild curry, this will precipitate diarrhea). However, for people with healthier bowels, the rectal route of magnesium administration should be fine.
Other methods of magnesium administration are discussed on
this page of Dr Myhill's website.
Note: boron and copper are needed for magnesium absorption and metabolism, so it might be an idea to add these two supplements:
Boron 3 mg
Copper 2 mg
to the intracellular magnesium boosting protocol as well.