Just in case you don't run across my post(s) in the other threads, I've used various types of Mg and I find a sustained release one lasts the longest and upsets my stomach the least - which is a big concern for me. It is produced by 'Jigsaw' out of Arizona. Do a search.
Good Luck, PN
Albany 2010. Brooklyn 2011
Hayes inspired Calcitriol+D3 2013-2014
Coimbra Protocol 2014-
DrG B12 Transdermal Spray 2014-
My Current Regimen http://www.thisisms.com/forum/regimens-f22/topic25634.html