Mag does the body no good in todays L-Form world anyhow.
Best to take Silica and some properly charged Calcium like in Legal Yogurt or using Coral Calc.
Its the Silica, Boron, Calcium levels that preserve Mag levels. Mag fully bound with Malic Acid like a good Mag Malate or Organic Plums/Prunes will work. Partial to the best Chinese salted plums myself..
Better slightly Mag deficient than a breeding ground for Lyme and other L-Form critters.