1) Take a Salt Bath. OK, this takes longer than 30 seconds. But adding magnesium (Epsom salts) to your bath water doesn’t. One of the best-known ways to leach heavy metals from the body is through the skin, submerged in a salt bath. The sulphates in Epsom salt help flush out toxins and heavy metals. The process is called reverse osmosis, and it literally pulls toxins out of your body.
The highest comfortable bath temperature for most humans is around just 40˚C (104˚F), which is far cooler than the coolest temperature tested in this experiment. The effect studied mostly depends on actually damaging the skin . It is conceivable that permeability starts increasing at lower temperatures with longer exposures … but sixty degrees lower? For the duration of a bath? Probably not for most substances. Skin probably evolved to be a good barrier across the range of temperatures humans are exposed to, which would certainly include 40˚C.
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The therapeutic value of Epsom salt.
“Human skin has unique properties of which functioning as a physicochemical barrier is one of the most apparent. The human integument is able to resist the penetration of many molecules.”25.
Wrapping it up.
Yes, it is possible that magnesium absorbed through the skin does something different, something good, for certain kinds of pain. After all, different calcium blocker drugs have different effects! But there’s not a shred of good, direct evidence of it. So it really boggles the mind that anyone would toss this idea around with any confidence. Seriously, they’re pretty much making it up as they go — wild speculation.
Hot hot hot! Does heat increase skin permeability?