Bathing in a magnesium-rich Dead Sea salt solution improves skin barrier function, enhances skin hydration, and reduces inflammation in atopic dry skin.

Proksch E1, Nissen HP, Bremgartner M, Urquhart C.
Int J Dermatol. 2005 Feb;44(2):151-7

https://www.ncbi.nlm.nih.gov/pubmed/15689218