Magnesium can lower blood pressure by relaxing blood vessels and counteracting the damage they endure.
However, research is mixed on how much it can lower blood pressure, and the ideal form and dosage of the supplement are yet to be determined.
Just like with other vitamins and minerals, food should be the primary source of magnesium whenever possible.
Taking too much magnesium through supplements can lead to side effects, some of which can be serious.
In the United States, the Food and Drug Administration (FDA) does not regulate dietary supplements in the same way it regulates prescription medications.
As a result, some supplements may not contain the ingredients listed on the label.