This is the one I take, it is all naturally occurring so I figured it was okay, no?
NO, NO MAG NOT BOUND TO MALIC ACID
You should also salt your fruit and salt all your meals to make sure that any Mag in that is pushed out of the system.
Snack on salted plums, any Chinese market will have them.
Most mag is bound to malic acid in plums and the salting takes care of the small amount that isn't.