I have no idea. I have read anecdotally that magnesium is being depleted from agricultural soils worldwide, and that a majority of Americans are deficient in magnesium. Mg is known to be a vital mineral for neurological and brain health.

So the problem is, I have no idea how much is in the foods I eat. I have no idea how much is needed for adults, or children.

Scurvy (vitamin C deficiency), beriberi (Vitamin B deficiency), Cretinism (iodine deficiency), and anemia (iron deficiency) all took decades of population-level health disaster (and thousands of lives) before they were solved by governments. Mg deficiency isn’t so acute a disease as these, so I am doubtful that we will get any large attention on the matter soon. Maybe Alzheimer’s, migraines, or other neurological disease research may discover the link sooner.