Magnesium Glycinate vs Citrate vs Oxide: Which One Actually Works?

Magnesium is a mineral, and minerals don't travel around the body on their own. They get bonded to something (usually an amino acid or a salt) and that 'something' decides how well your gut absorbs it.

A 400mg dose of magnesium oxide and a 200mg dose of magnesium glycinate can land you in completely different places. Higher number on the bottle is not the same as more magnesium getting into your cells.

Best for: sleep, calm, evening wind-downs, anyone with a sensitive stomach.

Glycinate is magnesium bonded to glycine, an amino acid that's itself associated with restful sleep. It's well absorbed, gentle on the gut, and doesn't have the laxative effect that other forms can.

This is the form you'll see in most premium sleep supplements for a reason. If your goal is 'help me actually wind down at night', this is the one.

Best for: occasional constipation, gentle digestive support.

Citrate is magnesium bonded to citric acid. It's absorbed reasonably well, but it has a mild laxative effect because it pulls water into the bowel. Some people love this. Others very much do not.

If your goal is digestion or you're someone who runs sluggish, this can be the right one. If your goal is sleep, this is probably not it.

Best for: cheap multivitamins that want a magnesium claim on the label.

Oxide is cheap and contains a high percentage of elemental magnesium on paper, but absorption is notoriously poor. Studies put it at roughly 4% bioavailability in some setups. Most of it passes straight through you, which is also why it can cause loose bowels.

If your magnesium supplement says 'oxide' and your goal is sleep, calm, or muscle recovery, you're paying for something that's mostly not landing.

Magnesium malate: bonded to malic acid, sometimes used for daytime energy and muscle support.

Magnesium threonate: more expensive, marketed for cognitive support. The research is interesting but early.

Magnesium taurate: bonded to taurine, sometimes used for heart and nervous system support.

For most everyday goals (sleep, calm, muscle recovery, just topping up a low intake), glycinate is the safest, gentlest, best-absorbed pick.

Our Wind Down Sleep Gummies use 100mg of magnesium per serve, sitting alongside 200mg of L-Theanine, GABA, glycine, ashwagandha, and a botanical blend of valerian, chamomile and passionflower.

It's intentionally a gentle, evening-friendly dose, not a megadose. Magnesium does the muscle-relaxation work, while the rest of the stack supports the calm headspace and wind-down ritual. The whole formula is melatonin-free.

If you're already on a separate magnesium powder, you don't need to stop, the dose here is on the lower, supportive end and plays nicely alongside.