Appears to be spray, not a cream
If you contribute $16 they wiil send you a spray bottle in March 2019 - if the Kickstarter campaign is successful
The founder of VitaminDWiki has been successfully adding Magnesium Chloride to a DMSO cream for 4+ years
DMSO has been proven to get a lot more Magnesium (and other stuff) into the body than just topical application.
Topcial Vitamin D works well ( Psoriasis etc.), but he uses >5,000 IU rather than just 1,000 IU