Magnesium Glycinate vs. Magnesium Oxide: Which Form Actually Works?

“I take magnesium and it does nothing.” Usually, the problem isn’t magnesium — it’s the form. The type on the label decides whether your body actually absorbs it or mostly passes it through. Here’s the difference that matters most.

Magnesium oxide: cheap, but poorly absorbed

Oxide is the most common form in budget supplements because it’s inexpensive and packs a lot of elemental magnesium per pill. The catch: it’s poorly absorbed, and it’s well known for a laxative effect. A lot of it simply doesn’t make it into your system.

Magnesium glycinate: absorbable and gentle

Glycinate is magnesium bound to glycine, a calming amino acid. It’s highly bioavailable, gentle on the stomach, and the form most associated with relaxation and sleep support — which is exactly why it’s the one to look for if calm is your goal.

Why moreCalm uses glycinate

moreCalm is built around magnesium glycinate (not oxide) precisely for absorption and gentleness — paired with L-theanine and myo-inositol to support a calm, steady nervous system. Every dose is on the label, no proprietary blends.

You don’t need more magnesium. You need a form your body can use. See what’s inside moreCalm →

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.