Journal of Women's Health: “Magnesium supplementation alleviates premenstrual symptoms of fluid retention.”

Should I take magnesium before my period?

Magnesium is very effective in relaxing muscles. This is the perfect relief when the cramps hit. When you have menstrual cramps, you experience pain from your uterus muscles contracting. Taking magnesium helps to relax these uterine muscles and offers relief from cramping pain.

How does magnesium help premenstrual syndrome?

Magnesium may help to prevent period pain

Taken daily, magnesium may prevent dysmenorrhea (menstrual cramps) in some people (1). It works by relaxing the smooth muscle of the uterus and by reducing the prostaglandins that cause period pain (1,8).