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Magnesium Glycinate vs Citrate: How They Compare
Magnesium Glycinate vs Citrate
Two of the most popular magnesium forms, side by side — how glycinate and citrate compare on absorption, tolerability, common uses and elemental content, plus a short note on other forms and where a multi-form blend fits. Magnesium is an essential mineral sold as a food supplement in the UK.
Last updated July 2026 · Written by Vitality Supplements Editorial Team · ~2,200 words · 8 min read
Food supplement information — not medical advice
UK manufactured
ISO/IEC 17025 batch tested
Certificate of Analysis on request
Evidence-referenced
Quick answer
Magnesium glycinate or citrate — what's the difference?
Both are well-absorbed, bioavailable forms of magnesium. Magnesium glycinate (magnesium bound to the amino acid glycine) is prized for being gentle on digestion and is a common everyday choice. Magnesium citrate (magnesium bound to citric acid) is also well absorbed and, because it has a mild osmotic effect in the gut, is often chosen by people who also want help with regularity. Neither is universally “better” — it depends on your priorities. A multi-form product such as our Ultimate 8 Magnesium includes both, plus six other forms, in a single daily dose.
Key takeaways
- Both glycinate and citrate are well-absorbed, bioavailable magnesium forms.
- Glycinate is especially gentle on digestion — a common everyday pick.
- Citrate is well absorbed and has a mild osmotic effect, often chosen for regularity.
- Elemental content differs by salt: citrate is around 16%, glycinate around 14% by weight.
- Other forms — malate, taurate, oxide and more — each have their own profile.
- A multi-form blend such as Ultimate 8 combines several forms, including both of these.
Side by side
Glycinate vs citrate, compared
Here is how the two forms line up on the attributes that matter most. For the wider family, see magnesium forms explained; for the mineral itself, see what is magnesium. Figures for elemental content are approximate and vary by exact salt.
| Attribute | Magnesium glycinate | Magnesium citrate |
|---|---|---|
| Absorption | Well absorbed; chelated to glycine | Well absorbed; bound to citric acid |
| Tolerability / GI effect | Very gentle; least likely to loosen stools | Mild osmotic (laxative) effect at higher doses |
| Common uses | Everyday support, evening routines, sensitive digestion | Everyday support where a little help with regularity is welcome |
| Elemental content | Around 14% elemental by weight (approx.) | Around 16% elemental by weight (approx.) |
| Best for | Those wanting a gentle, easy-on-the-stomach form | Those wanting good absorption plus a mild regularity effect |
Both forms deliver magnesium the body can use, so both support the same authorised functions: magnesium contributes to normal muscle function, to a reduction of tiredness and fatigue and to normal functioning of the nervous system. The practical difference is mostly about digestion and secondary effects, not whether the magnesium “works”.
Same mineral, different packaging — the choice is really about tolerability and your goal.
Form one
Magnesium glycinate
Magnesium glycinate (also sold as magnesium bisglycinate) is magnesium bound to glycine, a small amino acid. This chelated structure is well absorbed and, importantly, tends to be the gentlest on the stomach of the common forms — it is the one least likely to cause loose stools. That makes it a popular everyday choice, and a frequent pick for evening or wind-down routines.
Because it is gentle, glycinate is often favoured by people with sensitive digestion or anyone who has found other forms loosening. Its elemental content is moderate — roughly 14% by weight — so check the elemental figure per serving when comparing products. As with any form, magnesium contributes to normal muscle function and to normal psychological function when you get a meaningful amount.
Form two
Magnesium citrate
Magnesium citrate is magnesium bound to citric acid. It is one of the better-absorbed forms and has a slightly higher elemental content than glycinate — around 16% by weight. Its distinguishing feature is a mild osmotic effect in the gut: at higher doses it draws water into the bowel, which is why citrate is often chosen by people who would also welcome a little help with regularity. At typical supplement doses this effect is usually mild.
If gentle digestion is your priority, glycinate may suit you better; if you want good absorption and don't mind (or would welcome) the mild regularity effect, citrate is a sound choice. Both deliver usable magnesium, so both support the authorised functions such as a reduction of tiredness and fatigue and normal energy-yielding metabolism.
Malate
Magnesium + malic acid. Well absorbed and often associated with daytime energy routines.
Taurate
Magnesium + taurine. A gentle, well-tolerated form popular for everyday use.
Oxide
High elemental %, lower absorption. Cheap and magnesium-dense, but less bioavailable than chelated forms.
Multi-form blends
Several forms in one. Products like Ultimate 8 combine glycinate, citrate, malate, taurate and more in a single daily dose.
There is no need to overthink a single “winner”. Many people take a multi-form product precisely so they get the gentleness of glycinate, the absorption of citrate and the profiles of other forms together. See the whole family in magnesium forms explained, or how to size your dose in magnesium dosage.
Common questions
Glycinate vs citrate FAQ
Both are well-absorbed, bioavailable forms. Citrate has a slightly higher elemental content by weight, while glycinate is a chelated form that is very well tolerated. For most people the practical difference is digestion and secondary effects rather than a large gap in absorption.
Glycinate is generally the gentlest of the common forms and the least likely to loosen stools. Citrate has a mild osmotic effect that can loosen stools at higher doses — helpful if you want that, less so if you don't.
Yes — many multi-form supplements combine them, along with other forms. A blend such as Ultimate 8 Magnesium includes glycinate and citrate plus six more forms. Just keep your total magnesium within sensible limits — see our dosage guide.
Many people prefer glycinate in the evening because it is gentle on digestion. That is a matter of personal preference and tolerability rather than an authorised claim — magnesium is a food supplement, not a sleep treatment. Magnesium does contribute to normal psychological function and to normal functioning of the nervous system.
Malate and taurate are other well-tolerated chelated forms; oxide is magnesium-dense but less bioavailable. Each has its own profile — our forms guide covers them all. A multi-form blend lets you cover several at once.
If you want the gentlest option, choose glycinate. If you want good absorption plus a mild regularity effect, choose citrate. If you would rather not pick one, a multi-form blend gives you both and more. Whatever you choose, look for the elemental figure per serving and independent testing.
Why choose one form?
Ultimate 8 Magnesium combines glycinate, citrate, malate, taurate and four more forms in one daily dose — 1000mg of magnesium complex per serving, UK-made and independently batch tested, with a Certificate of Analysis available on request. From £17.99.
Continue reading
About the author. This guide was written and reviewed by the Vitality Supplements Editorial Team, a UK supplement manufacturer. Every batch we produce is independently tested by an ISO/IEC 17025-accredited laboratory, with a Certificate of Analysis available on request.
This article is for general information about food supplements and is not medical advice. Magnesium is sold as a food supplement in the UK; the health claims used here are the authorised EU/UK claims that apply when a product supplies a meaningful amount of magnesium. Always consult a qualified healthcare professional before starting any supplement, particularly if you are pregnant, breastfeeding, taking medication or managing a health condition. References available on our research references page.
