I don't know about Oxide form...
Magnesium oxide does not dissolve like the sulfate does.
It remains a powder. And as such it may not cross the skin
as well. (like it does not dissolve in the GI tract or be absorbed that way.)
The creams typically use sulfate type, which is water soluable and is the same as epsom salts.
If you want a global effect on the body for magnesium, I think oral is best. That is how we are
designed ...to eat foods with magnesium in them.
If you want a local effect on say the feet only or the knee etc, then a cream will work.
Children have very different volumes of distribution compared to adults, so putting the cream on THEM gives more
systemic effects. (volume of distribution involves the ratio of the skin area to weight).
Volume of distribution is important in dosing small children, who need small doses for this reason.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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