Let your doctor be the tiebreaker.
You cannot use the internet for comparing mineral supplements because the ads and the misinformation are too rife. EVERYBODY is looking for a way to sell expensive chelated versions of common minerals. A good rule of thumb is the higher priced the "supplement" the more likely the misinformation.
If I look hard enough I'm sure I can even find someone pushing Sodium Gluconate or Sodium Aspartate because of a claim that we don't absorb enough sodium from our SALT!
From the National Institute of Health (U.S. Government):
Several small studies suggest that magnesium supplementation may improve clinical outcomes in individuals with coronary disease. In one of these studies, the effect of magnesium supplementation on exercise tolerance, exercise-induced chest pain, and quality of life was examined in 187 patients. Patients received either a placebo or a supplement providing 365 milligrams of magnesium citrate twice daily for 6 months. At the end of the study period researchers found that magnesium therapy significantly increased magnesium levels. Patients receiving magnesium had a 14 percent improvement in exercise duration as compared to no change in the placebo group. Those receiving magnesium were also less likely to experience exercise-induced chest pain . |
In another study, 50 men and women with stable coronary disease were randomized to receive either a placebo or a magnesium supplement that provided 342 mg magnesium oxide twice daily. After 6 months, those who received the oral magnesium supplement were found to have improved exercise tolerance .
In a third study, researchers examined whether magnesium supplementation would add to the anti-thrombotic (anti-clotting) effects of aspirin in 42 coronary patients . For three months, each patient received either a placebo or a supplement with 400 mg of magnesium oxide two to three times daily. After a four-week break without any treatment, treatment groups were reversed so that each person in the study then received the alternate treatment for three months. Researchers found that supplemental magnesium did provide an additional anti-thrombotic effect.
The primary advantage of the oxide is that it is the CHEAPEST formulation and it had the greatest proporton of the molecule as MAGNESIUM (60%) as opposed to the citrate (16%.)
IF you want the citrate buy a 10 ounce bottle of citrate of magnesia for a buck and take a tespoonful a day. That's pretty reasonable.
But DO steer clear of those $20+ bottlefuls of various fancy amino acid chelates, there are a million of them. There's no reason to buy them for a mineral as readily soluble as magnesium.