How much magnesium do I need to help prevent migraines?

Daily adult requirements of magnesium for good health are 300-400 mg, an amount that you could obtain by eating 2 to 3 ounces of roasted pumpkin seeds or three to four bowls of bran cereal daily. Some people with normal blood levels of magnesium have low brain magnesium levels, so a blood test may not necessarily tell you if magnesium might be helpful for you. Taking a 600-mg magnesium supplement for adults or lower doses in children reduces migraine frequency by about one-third.

Another preparation you might try is magnesium oxide, 400mg daily. Some people find that the slow release preparation, Slow Mag or Mag Delay, are better tolerated.

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