Magnesium in a supplement is never on its own. It is always bound to another molecule, and that partner gives the form its name: magnesium glycinate, citrate, oxide and so on. Here is what that means when you compare labels.
Glycinate
Magnesium bound to glycine, an amino acid. It is the form in Auravitia Magnesium Glycinate, and a common choice for a daily, evening routine.
Citrate
Magnesium bound to citric acid. It is widely used, and the U.S. National Institutes of Health lists it among the forms that are more easily absorbed. At higher amounts it is also used as a laxative.
Oxide
A compact form that packs a lot of magnesium into a small tablet, which is why it is common in low-cost products and antacids.
How to compare two labels
- Look for elemental magnesium. Compare the mg of magnesium per serving, not the weight of the compound. Auravitia shows both: 275 mg of magnesium from 2,500 mg of magnesium glycinate.
- Check the serving size. A product can look stronger simply because its serving is more capsules.
- Mind the 350 mg limit. The NIH upper limit for magnesium from supplements and medicines is 350 mg a day for adults, unless your doctor recommends more. Add up everything you take, including antacids and laxatives that contain magnesium.
Which form is right for you?
That depends on why you take it and on your health. If you have a medical condition or take medication, ask your healthcare provider before starting any magnesium supplement.
Source: NIH Office of Dietary Supplements, Magnesium fact sheet for consumers.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.