What Is Bisglycinate? Magnesium Explained Simply
STATE editorial team · Updated Oct 6, 2026
In this article
Magnesium bisglycinate is simply magnesium combined with glycine, a small substance our bodies use, among other things, to build proteins. Magnesium remains the same mineral: “bisglycinate” tells you which form the supplement contains.
Why does that detail matter? Different forms of magnesium do not all behave in the same way during digestion. To choose a supplement, it helps to understand three things: its form, the amount of magnesium it provides and how well you tolerate it.
First of all, what is magnesium?
Magnesium is a mineral the body needs to function. It helps muscles and nerves work and plays a role in energy production. Seeds, pulses, nuts and leafy green vegetables provide it. A supplement can add magnesium to your diet when that is useful. [1]
So what does bisglycinate mean?
In a supplement, magnesium is combined with another substance. Depending on that combination, the form is called magnesium bisglycinate, citrate or oxide.
Here is an easy way to picture it: think of magnesium as the passenger and its form as the vehicle. The passenger stays the same; the vehicle changes. This analogy helps make sense of the names, but is not a literal description of what happens in the body.
In bisglycinate, magnesium is linked to two small units of glycine. “Bis” means two. Glycine is an amino acid: one of the small building blocks used to make proteins. You do not need to memorise a chemical formula: magnesium = the mineral; bisglycinate = its form. The technical word “chelated” refers here to this way of linking the mineral to glycine. [2]
How is it different from “regular” magnesium?
There is no single form called “regular magnesium”. A product labelled simply “magnesium” may contain oxide, citrate, bisglycinate or a mixture. Check the ingredients list to find out.
| Form | The combination | What to understand |
|---|---|---|
| Bisglycinate | Magnesium + glycine | A form to consider when looking for good digestive tolerance. It does not guarantee freedom from discomfort. |
| Citrate | Magnesium + citric acid | A well-absorbed form that can also soften stools, depending on the dose. |
| Oxide | Magnesium + oxygen | Contains a lot of magnesium in a small amount of compound, but is generally less well absorbed than citrate. |
“Absorbed” means that magnesium passes from the intestine into the body. Swallowing a particular amount does not mean that all of it will be absorbed. The form can matter, as can the dose and each person’s circumstances. [3]
Why is bisglycinate talked about so much?
It is often described as gentle on the stomach. A small study found better tolerance than oxide in people who had undergone intestinal surgery. That is an interesting finding, but not proof that it suits everyone better. In that study, absorption was not higher for the group as a whole. [4]
The useful question is therefore not just “which form is best?”, but “which formula fits my needs and suits me?” Even a form described as gentle can cause discomfort, particularly if the amount is too high.
How do you read the label correctly?
Look for the line showing the amount of magnesium per daily serving. That lets you compare magnesium intake, rather than the total weight of the bisglycinate.
A fictional example: a label says “1,000 mg magnesium bisglycinate, providing 100 mg magnesium”. The 1,000 mg includes the whole combination: magnesium and glycine. The magnesium amount here is 100 mg. This example only explains how to read a label; it is neither a STATE product formula nor a recommended dose.
If you see “elemental magnesium”, it simply means the amount of the magnesium mineral itself. Also check whether the figure refers to one capsule or several, and whether the ingredients list includes more than one magnesium form. [3]
The questions you may have
Is it “stronger” magnesium?
The name alone cannot tell you. Two supplements can use different forms and provide the same amount of magnesium. Compare the dose, the formula and tolerance.
Is it necessarily better for sleep?
Bisglycinate is not a sleeping pill. Choosing it does not guarantee better sleep. If sleep problems persist, seek professional advice about their cause rather than adding more supplements.
Is vitamin B6 part of bisglycinate?
No. B6 is a separate vitamin that is sometimes added to a formula. “Bisglycinate” does not mean “magnesium with B6”.
Are bisglycinate and glycinate the same thing?
In magnesium supplements, these names are often used for the same form. The ingredients list remains the best place to check what a product actually contains.
Does bisglycinate always mean magnesium?
No. There are bisglycinates of other minerals too, such as iron or zinc. Always read the full name: “magnesium”, “iron” or “zinc” tells you which mineral is supplied. [2]
Three things to check before choosing
- Identify your need rather than relying only on the name of a form.
- Compare the actual magnesium amount per serving and check your other supplements.
- Follow the directions and ask a pharmacist for advice if you take medication.
Kidney disease requires medical advice before supplementation. Magnesium can also interact with some medicines, including antibiotics: a pharmacist can explain how to space the doses. [3]
Remember: bisglycinate is not a different mineral. It is a way of providing magnesium by combining it with glycine. When choosing a supplement, the form matters, but so do the amount and your tolerance.
Further reading
- Magnesium and vitamin B6: should you combine them?
- When should you take magnesium?
- Which foods provide magnesium?
Sources
- NIH — Magnesium explained for consumers
- EFSA — Bisglycinates as mineral sources
- NIH — Forms, absorption, labelling and precautions
- Schuette et al. — Diglycinate and oxide compared in a small clinical study
Written by STATE. Updated 6 October 2026. Information only; not a substitute for personalised medical advice.
