Magnesium glycinate vs citrate
Both absorb well — this isn’t a winner and a loser. They’re built for different jobs, and picking the right one comes down to what you actually want it to do.
Pick glycinate for sleep, stress, and everyday use — it’s gentle and easy on the stomach. Pick citrate if constipation is part of the picture. Whatever you do, don’t judge by the milligrams on the front: absorption follows the form, not the label number.
Head to head
| What matters | Glycinate | Citrate |
|---|---|---|
| Absorption | High | Good |
| Best for | Sleep, stress, daily use | Constipation, regularity |
| On the stomach | Gentle | Mild laxative effect |
| Evening-friendly | Yes — calming | Less ideal before bed |
| Elemental magnesium | Lower per gram | Moderate per gram |
| Typical cost | A little more | Budget-friendly |
“Higher mg = more magnesium”
The claim: a 500 mg pill beats a 200 mg one.
The evidence: absorption tracks how soluble the form is, not the number on the label — in one study a 196 mg dose of a soluble form raised blood magnesium more than a 450 mg dose of cheap oxide. Read the form, not the front.
A fair caveat: oxide’s higher elemental percentage offsets some of this — the honest line is “form matters and label dose can mislead,” not “the cheaper form always loses.”
Which should you pick?
Go with glycinate, in the evening. Calming and gentle for nightly use.
Go with citrate. The mild laxative effect is the point here.
Cheap but poorly absorbed — fine only for occasional constipation.
Not sure which one’s in your cabinet?
Scan the bottle — the app reads the form and tells you if it fits your goal, or suggests a better match.