Late last night I found a site that had mag oil & mag flakes and some interesting info.

It said you can make a rub or bath spray with the product and it will absorb quite easily.
Another site said similar for Epsom salt rubs and soaks.
rub it on after a bath or shower , make a shower scrub or even a hand scrub or rub.


It seems the difference is between doing a detox with bath salts and/or using Epsom salts for the magnesium uptake.