Magnesium Glycinate vs Citrate: Which Should You Take?
Glycinate for calm and sleep, citrate for digestion. Here's a clear side-by-side on absorption, tolerability and best uses — and why you might want both.
Reviewed by Dr Elena Seranova
If you’re choosing between magnesium glycinate and magnesium citrate, the quickest way to decide is to start with your goal: glycinate for calm and sleep, citrate for digestion. They’re both well-absorbed, well-liked forms of magnesium — they’re just good at different jobs.
Below is a side-by-side on absorption, gut tolerability and best uses, plus an honest note on why the answer for a lot of people is “actually, a bit of both”.
Quick verdict
| Your goal | Better pick | Why |
|---|---|---|
| Sleep, calm, winding down | Glycinate | Gentle and calming; glycine supports relaxation |
| Occasional constipation | Citrate | Draws water into the bowel — a mild laxative effect |
| Sensitive stomach | Glycinate | Less likely to loosen the stool |
| Topping up low magnesium | Either | Both absorb well; pick by side-goal |
Magnesium citrate
Citrate is magnesium bound to citric acid. It’s absorbed reasonably well and is one of the most widely available forms — but its calling card is digestion. Because it pulls water into the intestine, it’s a common gentle laxative, which is great if regularity is your aim and unhelpful if it isn’t.
- Best for: occasional constipation, general top-up.
- Watch out for: a laxative effect at higher doses — not what you want right before bed.
Magnesium glycinate
Glycinate (precisely, bisglycinate) is magnesium bound to the amino acid glycine. It’s well absorbed, notably gentle on the stomach, and the glycine itself is associated with calm — which is why it’s the go-to evening form. We cover the form in full in our magnesium glycinate guide; if the two names trip you up, see magnesium bisglycinate vs glycinate, and for the rundown of effects, magnesium glycinate benefits.
- Best for: sleep, calm, sensitive stomachs, daily use.
- Watch out for: it won’t help with constipation — that gentleness is the point.
Side by side
| Glycinate (bisglycinate) | Citrate | |
|---|---|---|
| Bound to | Glycine (amino acid) | Citric acid |
| Absorption | Good | Good |
| Gut effect | Gentle | Can loosen stool |
| Best known for | Calm, sleep | Digestion |
| Evening-friendly | Yes | Less so |
Why not both?
Here’s the thing the “X vs Y” framing hides: these forms aren’t rivals, they’re tools. Plenty of people would benefit from the calm of glycinate and the broad coverage of a few other forms — which is the whole idea behind a multi-form complex. Rather than forcing one choice, a blend lets each form contribute its strength.
That’s how Oh!Mg is built: bisglycinate, lactate and taurate together, with lemon balm, L-theanine, B6, B5 and zinc, designed for the evening. Citrate isn’t in it — Oh!Mg leans into the calming, gentle forms for winding down — but the principle is the same: see how to choose the best magnesium supplement for when more than one form makes sense.
For sleep and calm, glycinate wins. For digestion, citrate. And if your needs span both, a thoughtfully-built complex beats picking a single salt.
FAQ
Questions, answered straight
Is magnesium glycinate or citrate better for sleep?
Glycinate. It's gentle and calming — the glycine it's bound to supports relaxation — which makes it the better fit for evening wind-down. Citrate can help you relax too, but it's better known for its effect on digestion.
Is magnesium citrate or glycinate better for constipation?
Citrate. It draws water into the bowel, which is why it's a common gentle laxative. Glycinate is chosen specifically because it's *less* likely to loosen the stool, so it's the weaker choice for constipation.
Can you take magnesium glycinate and citrate together?
Yes — they're different forms of the same mineral and are often combined in a complex. Just keep an eye on your total elemental magnesium across all sources so you don't overdo it, and follow the labels.
Which is better absorbed, glycinate or citrate?
Both are absorbed reasonably well — far better than oxide. Glycinate is prized for being gentle as well as well-absorbed; citrate is well-absorbed but more likely to have a laxative effect at higher doses.