Magnesium Forms and Doses: How to Read the Label

Short answer: Magnesium comes in several forms (glycinate, citrate, oxide, and others), and they are not interchangeable. The number that counts is the elemental magnesium, the actual magnesium content, which is often smaller than the big number on the front of the bottle. Many labels show the compound weight instead of the elemental amount. That is the label trick to watch for.

The label trick: compound weight vs elemental magnesium

A label might say "Magnesium (as magnesium oxide) 400 mg." Oxide carries a lot of other weight, so the elemental magnesium you actually get is a fraction of that front number. A transparent label prints the elemental amount in the Supplement Facts panel, right next to "Magnesium."

The common forms, plainly

• Glycinate: gentle on the stomach, a common everyday pick.
• Citrate: well absorbed, can be loosening at higher amounts.
• Oxide: cheap, heavy on compound weight, less elemental magnesium per pill.

What to look for on the label

• The elemental magnesium amount, printed clearly.
• The specific form named, not just "magnesium."
• The % Daily Value, so you can see where the dose sits.

FAQ

Which magnesium form is best? It depends on your goal and your stomach. Glycinate is a common everyday choice. What matters is that the form and the elemental dose are printed.

Why does my magnesium say 500 mg but seem like less? The big number may be compound weight. Look for the elemental magnesium amount.

Is more always better? No. Read the elemental dose and the Daily Value instead of chasing the biggest front-of-label number.

The Valenco take

Valenco prints the dose of every ingredient in every product, magnesium included. Hold whatever you buy to the same test: the elemental amount and the form, printed on the label. valenco.org.

These statements have not been evaluated by the Food and Drug Administration. No product mentioned is intended to diagnose, treat, cure, or prevent any disease.