If anyone has access to Consumer Labs or similar testing data on contaminants in magnesium supplements, can you please check to see if LEF brand's NeuroMag supplement (which is Magtein magnesium threonate) ranks? Also would be interested in ranking/levels of any supplement that contains only Magtein.
The concern stems from magnesium supplements frequently being contaminated with heavy metals such as lead, cadmium and arsenic.