In individuals who are not overweight magnesium is shown to be protective. In individuals who are overweight magnesium is shown to be highly protective. This is because overweight individuals are living in an inflammatory state more likely to have DNA damage from this inflammation and accompanying free radical damage. In other words, the worse off a person’s health is, the more he or she needs higher levels of magnesium for protection.
I recommend up to 800 mg per day of supplemental magnesium for individuals who are under high stress or overweight. This is a basic precaution for protection. As stress levels come down and weight improves, then 400 mg is likely adequate.
Byron J. Richards, Board Certified Clinical Nutritionist