What Is Magtein®? A Complete Guide to Magnesium L-Threonate

Magnesium supplements aren't difficult to find.

Walk through almost any supplement aisle and you'll see magnesium glycinate, citrate, oxide, malate and several other forms. But one form has attracted particular attention among people interested in memory, cognitive performance and sleep:

Magnesium L-threonate.

And if you've spent any time researching magnesium L-threonate, you've probably encountered another name:

Magtein®.

So what exactly is magnesium L-threonate? Is Magtein the same thing? Why does a 2,000 mg serving provide only about 144 mg of actual magnesium? What does the human research really show? And does it matter whether a supplement contains authentic Magtein or a generic magnesium L-threonate?

Let's sort it out.

What Is Magnesium L-Threonate?

Magnesium L-threonate is a form of magnesium in which magnesium is bound to L-threonic acid, a metabolite related to vitamin C.

It emerged from research investigating whether different magnesium compounds could effectively increase magnesium concentrations in the brain.

Much of the earliest research was conducted in animals and examined brain magnesium, synaptic plasticity, learning and memory. Human research followed, and magnesium L-threonate has since been investigated for outcomes involving cognitive performance, memory and sleep.

That does not mean magnesium L-threonate has been proven to prevent dementia, reverse cognitive decline or treat insomnia.

Those are much larger claims than the current evidence supports.

What makes magnesium L-threonate unusual is that researchers have specifically investigated it for brain-related outcomes, rather than merely as another source of dietary magnesium.

What Is Magtein®?

This is where an important distinction needs to be made.

Magtein® is the patented, branded form of magnesium L-threonate.

ThreoTech LLC identifies itself as the exclusive global ingredient supplier and patent licensee for Magtein and states that authentic Magtein is produced through its authorized supply chain and patented process.

Put more simply:

Magtein is magnesium L-threonate. But not everything sold as magnesium L-threonate is Magtein.

That distinction matters for two reasons.

First, when you read a clinical trial conducted specifically with Magtein, Magtein is the ingredient researchers actually tested.

It may be tempting to assume that every generic magnesium L-threonate ingredient is interchangeable with it. That could be true for a particular material—but a study of Magtein does not, by itself, establish the quality, composition or equivalence of another manufacturer's ingredient.

Second, there's an intellectual-property issue that most consumers probably know nothing about.

What About Generic Magnesium L-Threonate?

Generic magnesium L-threonate products and raw materials have appeared on the market. But the patent situation surrounding magnesium L-threonate is unusual.

Neurocentria owns intellectual property involving magnesium L-threonate, while ThreoTech is the exclusive licensee of a portfolio of patents associated with Magtein. The companies have actively enforced those intellectual-property rights.

For example, ThreoTech and Neurocentria filed a patent-infringement action against Green Jeeva in 2024 concerning magnesium L-threonate; that dispute subsequently ended in a confidential settlement. In another action filed in 2025, Neurocentria and ThreoTech alleged infringement involving magnesium L-threonate products after a prior licensing relationship ended.

That history is important—but it should not be interpreted as evidence that every generic magnesium L-threonate product is contaminated, adulterated or chemically different.

Those are separate questions.

We have not seen evidence that would justify making those claims.

For Epoch, the decision was much simpler:

We chose authentic Magtein®.

If we're going to formulate around the research on Magtein, we'd rather use the ingredient associated with that research and its authorized supply chain than ask our customers to assume a generic material is equivalent.

Why Does 2,000 mg of Magtein Provide Only About 144 mg of Magnesium?

This confuses a lot of people.

A full serving can provide:

Magtein® Magnesium L-Threonate: 2,000 mg

while providing only approximately:

Elemental Magnesium: 144 mg

Where did the other 1,856 mg go?

Nowhere.

The 2,000 mg represents the weight of the entire magnesium L-threonate compound, not the weight of magnesium by itself.

Magnesium is bound to the threonate portion of the molecule. Only part of the compound's total weight is elemental magnesium.

That's why comparing magnesium supplements based only on the largest milligram number on a label can be misleading.

Different forms of magnesium contain different proportions of elemental magnesium.

And with magnesium L-threonate, the relatively large amount of compound required to deliver that magnesium creates another practical issue:

It's a lot of material to swallow.

Why Does Magnesium L-Threonate Often Require Multiple Capsules?

If you want approximately 2 grams of magnesium L-threonate, that material has to go somewhere.

With a capsule product, that commonly means taking multiple capsules to obtain a full serving.

Some people couldn't care less.

Others don't like swallowing pills. Some have genuine difficulty swallowing them, while others already take several supplements and simply don't want more capsules.

That's one reason Epoch's Magtein product is a liquid.

We concentrated the full 2-gram serving of authentic Magtein into one tablespoon—approximately half an ounce.

Measure it. Take it. Done.

We're not claiming that putting Magtein in a liquid magically makes the molecule more effective than authentic Magtein in a capsule.

The advantage is much simpler:

You don't have to swallow a handful of pills to take it.

The current formula is flavored and sweetened with stevia. Taste is personal, and not everyone loves stevia. That's something we continue to evaluate as formulations evolve.

But the fundamental reason for making the product a concentrated liquid hasn't changed: we wanted an easy way to take a meaningful amount of Magtein without adding several more capsules to someone's day.

What Does Human Research on Magtein Show?

This is where magnesium L-threonate becomes particularly interesting—and also where marketing claims can get ahead of the science.

A recent randomized, double-blind, placebo-controlled trial included 100 adults ages 18 to 45 who reported dissatisfaction with their sleep.

Participants received either placebo or 2 grams of Magtein daily for six weeks.

Compared with placebo, the Magtein group demonstrated greater improvement on the NIH Total Cognition Composite. Larger treatment effects were observed in working and episodic memory, and reaction time also improved.

But not every measurement favored Magtein.

There was no significant between-group difference on Raven's Progressive Matrices, another cognitive assessment.

Sleep results were similarly mixed.

Participants taking Magtein reported greater improvement in sleep-related impairment, but several other subjective sleep measures did not significantly differ from placebo. Most importantly, objective sleep measurements collected through Oura Rings did not show significant between-group differences in sleep outcomes.

The study also reported favorable changes in resting heart rate and heart-rate variability.

Overall, Magtein was reported as well tolerated.

That's considerably different from saying:

"Magtein makes you smarter and fixes your sleep."

The research doesn't establish that.

What it does provide is controlled human evidence suggesting that magnesium L-threonate deserves further investigation for particular cognitive and sleep-related outcomes.

What About Other Sleep Research?

Another randomized, double-blind, placebo-controlled trial published in 2024 studied 80 adults ages 35 to 55 with self-reported sleep problems.

Participants took 1 gram per day of magnesium L-threonate or placebo for 21 days.

Researchers reported significant differences favoring magnesium L-threonate on several subjective measures, including behavior upon awakening, energy, daytime productivity, mood and mental alertness.

Several Oura Ring measures also favored magnesium L-threonate, including deep-sleep and REM-sleep scores.

Again, that's interesting evidence.

It isn't proof that magnesium L-threonate treats insomnia.

There's an important difference between supporting aspects of sleep in a clinical study and treating a diagnosed sleep disorder.

Magtein vs. Magnesium Glycinate: Which Is Better?

There may not be one universally "best" magnesium.

A better question is:

Why are you taking it?

Magnesium glycinate is commonly used as a general source of supplemental magnesium and can provide considerably more elemental magnesium relative to the amount of compound consumed.

Magnesium L-threonate is different.

It provides relatively little elemental magnesium compared with its total compound weight, but it has specifically been investigated for cognitive and brain-related outcomes.

Someone primarily trying to increase total dietary magnesium intake might therefore make a different choice from someone specifically interested in magnesium L-threonate research.

And those choices aren't necessarily mutually exclusive.

We'll examine magnesium L-threonate vs. magnesium glycinate separately because there's considerably more to that comparison than which name looks better on a supplement bottle.

Why Epoch Chose Authentic Magtein®

There are usually cheaper ways to formulate supplements.

That's not always a bad thing.

A generic ingredient can sometimes be perfectly appropriate, and a trademark on an ingredient doesn't automatically make it better.

But when the reason we're interested in an ingredient is partly because of the clinical research conducted on that particular branded material, we think there's a reasonable argument for actually using it.

Magtein has been studied for more than 15 years, and ThreoTech reports more than 50 peer-reviewed publications and more than 10 human clinical trials involving its research program.

So when we formulated Epoch's magnesium L-threonate liquid, we chose authentic Magtein.

Not something we're asking you to assume is the same thing.

The actual ingredient.

This Product Actually Started in a Gym

There's another reason Epoch's version is a liquid.

The idea predates Epoch Nutrition Sciences by many years.

I spent decades as a strength coach and gym owner, and one of my mentors was the late strength coach Charles Poliquin.

Years ago, I sold a small liquid magnesium formula associated with Charles called Zen Mag Liquid Formula in my gym.

I could get only about 100 little two-ounce bottles at a time.

And something funny happened.

A few clients liked them enough that they essentially hoarded them.

I had clients who would buy 30 at once—their month's supply—as soon as I received them. With only about 100 available, three people could account for almost the entire shipment.

There wasn't much business brilliance involved. I wasn't even making much money on them because I didn't want to mark them up very much.

But I remembered the product.

More importantly, I remembered how much some people liked the simplicity of taking magnesium as a small liquid shot instead of another collection of pills.

Years later, when I had the opportunity to build my own product, I revisited the concept.

I didn't want to simply reproduce an old formula.

So we updated it.

We chose authentic Magtein® magnesium L-threonate, changed the flavor system and concentrated a full 2-gram serving into one tablespoon.

In one sense, it's a modern magnesium product built around an unusual and increasingly researched form of magnesium.

In another sense, its story started decades ago with a few clients in my gym buying almost every bottle I could get.

So, Is Magnesium L-Threonate Worth Taking?

It depends on what you want from a magnesium supplement.

If your only objective is obtaining the greatest amount of elemental magnesium for the lowest possible cost, magnesium L-threonate probably isn't the obvious choice.

It's a specialized and relatively expensive form of magnesium.

Its appeal comes from somewhere else.

Magnesium L-threonate has been specifically investigated for cognitive performance, memory, sleep and related outcomes. Human research has produced promising results—but not every outcome in every trial has favored magnesium L-threonate over placebo.

We think that's the interesting story.

Not that every question about magnesium L-threonate has been answered.

It hasn't.

But enough research now exists to make those questions worth asking.

And when we decided to formulate it, we chose the patented, branded ingredient associated with that research:

Magtein®.

by
Michael Wohltmann

FAQ section 

Is Magtein the same as magnesium L-threonate?
Magtein® is the patented, branded form of magnesium L-threonate supplied by ThreoTech. Not every ingredient labeled magnesium L-threonate is authentic Magtein. Magtein

How much Magtein is a full serving?
A commonly used amount of Magtein is 2 grams daily, providing approximately 144 mg of elemental magnesium. A recent randomized controlled trial also used 2 grams daily for six weeks. PubMed

Why does Magtein provide only 144 mg of magnesium?
The 2,000 mg refers to the entire magnesium L-threonate compound. Only part of that weight is elemental magnesium.

Is generic magnesium L-threonate fake?
Not necessarily. Generic magnesium L-threonate should not automatically be described as fake, contaminated or ineffective. However, Magtein is a patented branded ingredient, and its patent holders/licensees have pursued infringement claims involving magnesium L-threonate products. Nutritional Outlook

Is liquid Magtein better than capsules?
We don't have evidence establishing that liquid Magtein is inherently more effective than authentic Magtein delivered in capsules. The practical advantage is that a liquid can deliver a substantial amount of magnesium L-threonate without requiring multiple capsules.

Does magnesium L-threonate help with sleep?
Randomized controlled trials have reported improvements in some sleep-related outcomes, but results aren't uniform across studies or measurements. It should not be characterized as a proven treatment for insomnia. PubMed

Does magnesium L-threonate improve memory?
Human trials have reported improvements in certain cognitive and memory measures, including working and episodic memory in a recent controlled trial, but not every cognitive measure showed a significant advantage over placebo. 

References

Lopresti AL, Smith SJ. The effects of magnesium L-threonate (Magtein®) on cognitive performance and sleep quality in adults: a randomised, double-blind, placebo-controlled trial. Frontiers in Nutrition. DOI: 10.3389/fnut.2025.1729164.

Hausenblas HA, Lynch T, Hooper S, et al. Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: A randomized controlled trial. Sleep Medicine: X. 2024;8:100121. DOI: 10.1016/j.sleepx.2024.100121.

ThreoTech LLC. Magtein® — About Us; Research and Ingredient Information.

Neurocentria Inc. and ThreoTech LLC v. Mando International LLC d/b/a Kappa Nutrition. U.S. District Court, Central District of California. Complaint filed 2025.

These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease.