Should i take 250mg magnesium oxide for deficiency?

Dose depends on leve: Dose of magnesium oxide for magnesium deficiency depends on the level of magnesium in red blood cells.250 mgm is low dose you may need 500 mgm to 1000 mgm to correct deficiency and even more in severe deficiencysevere deficiency may need to be treated with IV magnesium check with your doctor before starting on magnesium and get the level done preferably red blood cell magnesium level and serum lev.