Guide
Magnesium glycinate vs taurate
Taurate leans on taurine's own reputation more than on trials of the combined salt. Here's the chemistry, the honest evidence gap, and how it compares with glycinate.
Magnesium taurate pairs magnesium with taurine, an amino acid marketed on its own for cardiovascular and calm-focus use; glycinate pairs it with glycine and is marketed on sleep and gentleness. Taurate carries less elemental magnesium per gram than glycinate, and we could not find a dedicated human trial testing the taurate salt itself against another magnesium form.
The two forms, side by side
| Magnesium glycinate | Magnesium taurate | |
|---|---|---|
| Formula | C4H8MgN2O4 | C4H12MgN2O6S2 |
| Molar mass | 172.42 g/mol (PubChem CID 84645) | 272.6 g/mol (PubChem CID 13343447) |
| Elemental magnesium by weight | ~11–14% | ~9% |
| Typically sold for | General daily supplementation, sleep marketing | Cardiovascular and calm-focus marketing, borrowing taurine's own reputation |
| Dedicated human trials of the salt itself | Several, mostly sleep-focused (see below) | None found isolating magnesium taurate against another magnesium form |
| Watch out for | Sleep and absorption claims outrun the evidence | The marketing case rests on taurine's separate literature, not on trials of the combined salt |
Why taurate is marketed the way it is
Taurine has its own following in supplement marketing, largely around cardiovascular and stress-related use, independent of magnesium. Pairing it with magnesium as a single salt lets a label carry both ingredients' reputations at once, even though the two haven't necessarily been tested together as that specific compound. We looked for a human trial that tested magnesium taurate itself — not taurine alone, not magnesium alone, the combined salt — against another magnesium form or a placebo in a general population, and did not find one. What marketing for this form usually cites is either taurine's separate literature or magnesium's own general nutrient roles, attributed to the pairing.
What the absorption literature says
The broader magnesium-absorption literature doesn't identify taurate as unusual in either direction. A 2017 review of intestinal magnesium absorption concludes that the type of magnesium salt matters less than is often assumed, and that where organic salts outperform inorganic ones the effect is inconsistent across studies. Nothing in that literature singles out taurate as better or worse absorbed than citrate, oxide or glycinate.
Glycinate's own head-to-head record isn't strong either: a 2003 trial found an amino-acid chelate did not outperform citrate, and a 2024 crossover study found no significant plasma rise from bisglycinate at all while citrate and oxide both showed one. Between the two forms on this page, glycinate at least has that (unflattering) direct data; taurate has none we could locate.
What each is typically used for
Taurate is sold almost exclusively on the cardiovascular and calm-focus angle, leaning on taurine's reputation rather than trial data for the combined salt. Glycinate is sold on sleep and being easier on the stomach than other forms — a claim the broadest recent systematic review rates low to very low certainty, concluding it doesn't support magnesium as a routine sleep treatment.
Elemental magnesium and dose
Taurate is one of the less concentrated common forms by weight, at roughly 9% elemental magnesium, similar to L-threonate and below glycinate's 11–14%. That means a taurate capsule needs more total compound weight to deliver the same elemental magnesium dose as a glycinate capsule.
Side effects
Taurine itself is generally considered well tolerated at typical supplement doses and is naturally present in meat, fish and the human body. Combined with magnesium as a single salt, the main side-effect consideration is still magnesium's own: loose stools become more likely once total supplemental intake goes above 350 mg/day for most adults, the same limit that applies to glycinate. There's no dedicated trial comparing GI tolerability between the two forms at matched elemental doses.
What to check on a taurate label
Because the elemental percentage of taurate is lower than glycinate's, a "500 mg magnesium taurate" capsule delivers less actual magnesium than the same weight of glycinate would — roughly 45 mg versus 55–70 mg. If a taurate product's main selling point is the taurine content rather than the magnesium, check whether the label states a taurine amount separately; some products list only the combined salt weight, which makes it hard to know how much of either ingredient you're actually getting.
Questions people ask
What is the difference between magnesium glycinate and magnesium taurate?
Glycinate binds magnesium to glycine and carries more elemental magnesium per gram. Taurate binds it to taurine and is marketed on taurine's separate cardiovascular and calm-focus reputation, without a dedicated human trial of the combined salt that we could find.
Can you take magnesium glycinate and magnesium taurate together?
There's no known hazard in combining them. Doing so mainly means adding their elemental magnesium totals, which should stay under the 350 mg/day supplemental upper limit for most adults; it doesn't add a benefit beyond that combined dose.
Is magnesium taurate better absorbed than magnesium glycinate?
We found no trial comparing the two directly, and the general absorption literature doesn't rank one common magnesium salt reliably ahead of another. Any absorption claim for either form, at typical supplement doses, is going beyond what's been tested.
Related reading
Sources
- Intestinal Absorption and Factors Influencing Bioavailability of Magnesium-An Update A 2017 review of magnesium absorption research concluded the type of magnesium salt matters less than is often claimed — the evidence for one form being reliably better absorbed than another is inconsistent.
- Mg citrate found more bioavailable than other Mg preparations in a randomised, double-blind study In 46 healthy adults taking 300 mg a day for 60 days, citrate raised blood magnesium most; an amino-acid chelate did not beat it.
- Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE(TM) Microcapsules) Versus Other Magnesium Sources In 40 healthy adults given one dose, blood magnesium rose after citrate and oxide but not significantly after bisglycinate.
- Magnesium Supplementation for Sleep in Adults: A Systematic Review of Randomized Controlled Trials Across 12 trials, magnesium's effect on sleep was inconsistent, and the certainty of the evidence was rated low to very low.
*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.
