Designs for Health
Designs for Health NeuroMag - Magnesium L-Threonate (Magtein®) for Brain Health, Focus, and Sleep (90 Vegan Capsules)
The magnesium form built specifically to reach the brain, at the same 145 mg dose used in the human research behind it. One mineral, one mechanism, nothing else added.
- 145 mg of elemental magnesium from Magtein®. The patented magnesium L-threonate form, dosed at the same amount used in the human research on it, not a token sprinkle.
- Can help support cognitive function, memory, and sleep. The three areas most tied to magnesium's role in the brain specifically, rather than a generic "energy and mood" mineral pitch.
- A genuinely different mechanism, honestly framed. Threonate's blood-brain-barrier story started in animal research and has limited but real human data behind it. More on that trade-off below.
- One ingredient, no blend. Magnesium L-threonate and nothing else active, so there's nothing hiding behind a proprietary formula name.
- Vegan, Non-GMO capsule. Cellulose-based, no gelatin, no animal-derived ingredients.
- Third-party tested, made in the USA. Verified for purity and potency independently, not just an in-house claim on the label.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Most magnesium supplements are chosen for the body: better sleep, less muscle tension, general relaxation. This one is chosen for a narrower reason, its proposed ability to actually reach brain tissue more effectively than other magnesium forms.
That story started with MIT-led animal research showing magnesium L-threonate raised brain magnesium levels and improved learning and memory performance in aged rats more than other magnesium compounds tested side by side. It’s a genuinely interesting mechanism, and it’s why this specific form, not magnesium generally, is the one we point people to for the cognitive and sleep angle.
The honest caveat, and we’d rather lead with it than bury it: the human evidence behind magnesium L-threonate is real but still limited, mostly smaller trials in older adults or people with sleep or memory complaints, not the deep, decades-long evidence base something like caffeine and theanine has. We think the mechanism and the available human data are compelling enough to stock it. We don’t think you should walk away believing this is as settled as, say, the cardiovascular case for omega-3s.
One practical note most magnesium comparisons skip: magnesium forms differ a fair amount in how they sit with your gut. Threonate is generally reported as gentler and less laxative than magnesium oxide or citrate, which matters if you’ve tried a cheaper magnesium before and it disagreed with you. That’s a real-world observation, not a formal clinical claim, but it’s consistent with what we hear from people using it.
Product Details
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What is in the capsule, and why
One active ingredient: 2 g of Magtein® Magnesium L-Threonate per serving, delivering 145 mg of elemental magnesium. Nothing else is included beyond the capsule shell and flow agents needed to manufacture it. This is a single-ingredient formula on purpose.
Why this specific form of magnesium
Magnesium comes in many supplemental forms, oxide, citrate, glycinate, and others, and they are not interchangeable in the body. Magnesium L-threonate was developed specifically around research suggesting it crosses into the brain more readily than other forms. The foundational study, done in aged rats, found that magnesium L-threonate raised brain magnesium levels and improved measures of learning and memory more than magnesium compounds like magnesium chloride or magnesium citrate tested in the same research. That's an animal study, not a human trial, so treat the mechanism as a genuinely promising, well-reasoned story rather than a proven human outcome.
What the human evidence adds
Human research on magnesium L-threonate specifically is smaller in scale than the animal work that inspired it, generally conducted in older adults or people with sleep difficulties or mild cognitive complaints, looking at outcomes like sleep quality, working memory, and executive function. Some of these trials report meaningful improvement; the body of evidence is real but still developing, and results in younger, healthy adults specifically are less studied than in older populations. If you want a settled, decades-deep evidence base, this isn't that ingredient. If you want a mechanistically interesting form with growing human support, it is.
Magnesium's broader role, briefly
Beyond the brain-specific story, magnesium is a cofactor in several hundred enzymatic reactions in the body, including ones involved in nerve transmission, muscle relaxation, and the GABA and melatonin pathways tied to sleep. A meaningful share of adults don't get enough magnesium from diet alone, which is part of why it's a reasonable foundational supplement even setting the brain-specific angle aside.
Threonate vs. other forms, for the decision
If sleep is your only goal, magnesium glycinate is a commonly recommended alternative, with its own calming reputation and generally excellent tolerability. Threonate is the one we'd choose specifically when the cognitive and memory angle matters to you as much as, or more than, sleep alone. The two aren't mutually exclusive, but there's no strong reason to take both at full dose simultaneously.
Who it tends to suit
- Anyone specifically interested in the cognitive and memory angle of magnesium supplementation, not just general relaxation.
- People who've tried magnesium oxide or citrate before and found it too harsh on digestion.
- Anyone building a foundational stack alongside a choline source or omega-3, where magnesium fills a genuinely different role.
Who it is probably not for
- Anyone who wants strong, definitively settled clinical evidence before trying something. The mechanism is promising; the human trial base is still developing.
- Anyone whose only goal is sleep and who wants the most well-established sleep-specific magnesium form; glycinate has a longer track record there specifically.
- Anyone with kidney disease without medical guidance, since magnesium clearance depends on healthy kidney function.
How To Use
Take 3 capsules daily. This is the full studied serving, providing 145 mg of elemental magnesium. You can take it all at once or split it across the day, commonly morning and evening, whichever fits your routine better.
If sleep is your main goal, taking it in the evening is a reasonable default. Magnesium's role in GABA and melatonin pathways makes an evening dose a sensible starting point, though there's no strict requirement to take it at a specific time for the cognitive benefits specifically.
Give it real time. The animal research behind this ingredient dosed consistently for over three weeks before seeing meaningful brain magnesium changes. Human trials generally ran several weeks as well. A few days is not a fair test; give it at least three to four weeks of consistent use before deciding whether it's doing anything for you.
How to stack it
- Fits cleanly alongside our caffeine and theanine capsules, a choline source, or an omega-3, no mechanism overlap.
- If you're also taking a separate magnesium product, add up your total elemental magnesium intake rather than stacking two full doses.
- No cycling required. This is meant to be a steady, ongoing daily foundation.
What to avoid
- Taking it within 2 hours of certain antibiotics (tetracycline or quinolone-class) or bisphosphonate medications, since magnesium can interfere with their absorption. Space doses apart if you're on either.
- Assuming more is automatically better. The studied dose is 145 mg elemental magnesium; there's no evidence that exceeding it improves the cognitive or sleep benefits further.
Third Party Lab Testing
- Third-party tested for purity and potency, verified independently rather than taken on the brand's word alone.
- Manufactured in the USA.
- Magtein® is a patented, trademarked ingredient. Brands have to license it rather than substituting a generic magnesium L-threonate, which is part of why it comes with its own supporting research and documentation.
- Vegan and Non-GMO formulation, as stated on the label, with a plant-based cellulose capsule rather than gelatin.
As with any supplement, the strongest form of proof is a batch-specific Certificate of Analysis tied to the lot number on your bottle. If verifying a specific batch matters to you, note the lot number and request the COA directly from the manufacturer.
Ingredients
Supplement Facts - Serving Size: 3 Capsules - Servings Per Container: 30
| Per 3 capsules | Amount | % DV |
|---|---|---|
| Magnesium (from 2 g Magtein® Magnesium L-Threonate) | 145 mg | 34% |
Other Ingredients: Cellulose (capsule), dicalcium phosphate, vegetable stearate, microcrystalline cellulose.
Free from: Gelatin (vegan capsule). Animal-derived ingredients.
Warnings (worth reading)
- Consult your doctor before use if you have kidney disease or impaired kidney function, since magnesium is cleared by the kidneys and can build up to unsafe levels if that function is reduced.
- Consult your doctor or pharmacist before use if you take antibiotics (tetracycline or quinolone-class), bisphosphonate medication, or blood pressure medication, since magnesium can interact with each of these.
- Consult your doctor before use if you are pregnant or nursing.
- Discontinue and consult a physician if you experience adverse effects.
- Keep out of reach of children. Store in a cool, dry place.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. It is not a substitute for professional medical advice. For anything you are unsure about, talk to a qualified healthcare provider.
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