I haven't tried the recipe you posted, but did want to ask what you think of the powder Magna Calm, which you mix in water and then drink?

Also, there is a product out there called magnesium oil which isn't oil at all but is water super-saturated with magnesium which you rub on the soles of your feet where there are lots of blood vessels. The theory is that the magnesium absorbs into your body just like it would it you were to take an epsom salt bath.

And then of course there are epsom salt baths which are great as well, because your entire body can absorb the magnesium from the bath water.