Is Pure Encapsulations Magnesium Glycinate Worth It?
Worth it if plain magnesium has ever bothered you
By Daniel Kruger, tech & home gear · updated 2026-07-22
Worth it if plain magnesium has ever bothered you

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Picture the supplement aisle: a wall of magnesium bottles, oxide, citrate, glycinate, threonate, all promising the same vague calm and better sleep. You grab the cheapest one, take it for a week, and your stomach reminds you why cheap magnesium has a reputation. That's the doubt sitting behind every pure encapsulations magnesium glycinate search: is this just an expensive way to buy the same mineral, or is the form actually different.
Here's the part the label is quietly betting you'll skip over. Magnesium on its own is a mineral your gut struggles to absorb in large doses, that's why cheap oxide forms flush straight through and take your comfort with them. Glycinate is magnesium bonded to glycine, an amino acid, and that bond changes how your intestine treats it, it gets absorbed through amino acid transport pathways instead of just sitting in the gut osmotically pulling water in. Less water pulled in means less of the bathroom urgency that gives magnesium supplements their reputation. Glycine itself isn't just a delivery vehicle either, it has its own calming effect on the nervous system, which is why this form gets paired with sleep and relaxation claims more than oxide or citrate do. The capsule format, 90 of them here, means you're dosing it daily rather than dissolving powder, and the actual pitch is less about the magnesium itself and more about what's not riding along in the capsule while the mineral handles metabolism, nerve, and muscle support in the background.
So the real purchase here isn't magnesium, plenty of cheap things contain magnesium. You're paying for the form and the absorption path, the difference between a supplement that sits comfortably and one that sends you looking for a bathroom. Whether that's worth it depends entirely on whether your current magnesium has ever caused you a problem.
Worth it if
- cheaper magnesium forms have ever upset your stomach
- you want a calming, well-absorbed dose before bed
- you'd rather avoid unnecessary fillers and common allergens
Skip it if
- plain magnesium oxide already works fine for you
- you're working with a tight supplement budget
- you haven't had any issue with your current form
If a cheaper magnesium has ever upset your stomach or done nothing for your sleep, this is a reasonable next thing to try for a few weeks. If plain oxide has never bothered you and you're just chasing a trend, save the money and stick with what already works. Either way, you now know what glycinate is actually doing differently.
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Before you go
What is the downside of taking magnesium glycinate?
The main downside is cost relative to basic oxide or citrate forms, and for a small number of people, mild drowsiness if taken during the day, since glycine has a calming effect.
Does Pure Encapsulations magnesium glycinate help you sleep?
It's formulated to support relaxation and the sleep cycle through the combined effect of magnesium and glycine, though it works as a supporting supplement rather than a standalone sleep aid.
Which magnesium is better, Thorne or Pure Encapsulations?
Both use similar glycinate chemistry and comparable quality standards, so the practical difference usually comes down to capsule size, dose per serving, and which fillers are excluded.
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