Magnesium Glycinate vs Citrate: What's the Difference?
Magnesium glycinate vs citrate is one of the most common questions when choosing a magnesium supplement — and a genuinely useful one, because the two forms behave differently in practice. This guide explains how they differ, which tends to suit which situation, and how to choose between them.
Both are well-absorbed forms of magnesium
First, the reassuring part: both magnesium glycinate and magnesium citrate are well-absorbed forms, and both deliver magnesium — which contributes to normal muscle function, the normal functioning of the nervous system, normal psychological function, normal energy-yielding metabolism, and the reduction of tiredness and fatigue. So whichever you choose, you're getting a good form of the mineral. The difference is in how they feel to take and what they're often used for.
Magnesium glycinate
Magnesium glycinate (sometimes called bisglycinate) is magnesium bound to the amino acid glycine. Its main practical advantages:
- Gentle on the stomach — it's one of the least likely forms to cause digestive upset, which makes it well suited to daily and evening use.
- Well absorbed — the glycine binding helps it absorb well.
- Popular for evening routines — because it's gentle and well tolerated, it's the form many people choose to take at night.
Magnesium citrate
Magnesium citrate is magnesium bound to citric acid. Its characteristics:
- Well absorbed — citrate is a well-absorbed, widely available form.
- Can have a laxative effect — at higher doses it draws water into the gut, which is why it's sometimes used specifically for occasional constipation. For some people that's a benefit; for others taking magnesium nightly, it's a reason to prefer glycinate.
So which should you choose?
A simple way to decide:
- For comfortable daily or evening use, magnesium glycinate is usually the better pick — gentle, well absorbed, and easy to take consistently.
- If you also tend toward occasional constipation, citrate's mild laxative effect might suit you — though that same effect puts others off.
- Either way, check the elemental magnesium per serving (the actual magnesium content), not just the weight of the compound, since that's what varies between products.
For most people who just want a comfortable, well-absorbed daily magnesium, glycinate is the sensible default — which is why it's the form we built our flagship around.
Where Pure Vitamins fits
Our Magnesium Glycinate 3-in-1 is built around the gentle, well-absorbed glycinate form, as a triple-form complex. Magnesium contributes to normal muscle function, the normal functioning of the nervous system and normal psychological function. Every dose is declared on the label and it's made in a GMP-certified facility with a Certificate of Analysis available on request.
For the bigger picture on choosing magnesium, see our guide to the best magnesium for an evening routine.
Frequently asked questions
Is glycinate or citrate better? Neither is universally better — both are well absorbed. Glycinate is gentler and better for comfortable daily use; citrate can have a mild laxative effect that suits some people and not others.
Which magnesium is gentlest on the stomach? Magnesium glycinate is one of the gentlest, which is why it's popular for daily and evening use.
Does magnesium citrate cause loose stools? At higher doses it can, because it draws water into the gut — that's why it's sometimes used for occasional constipation.
Which is better for an evening routine? Most people prefer glycinate at night for its gentleness and tolerability.
This article is for general information and is not medical advice. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Always consult a healthcare professional before use if you are pregnant, breastfeeding, taking medication or managing a medical condition.
— Dr. Miron, Founder of Pure Vitamins UK
