Sports Research
Sports Research Magnesium L-Threonate 2000mg with Magtein® - Brain-Focused Magnesium (180 Veggie Capsules)
Essentially the same Magtein dose as the pricier magnesium L-threonate we carry, at less than half the daily cost. Here's the honest math on both.
- 144 mg of elemental magnesium from Magtein®. Practically identical to the 145 mg dose in the other magnesium L-threonate we carry, from the same patented ingredient.
- 180 capsules, a genuine 2-month supply. The label's own math (60 servings at 3 capsules each) works out cleanly; more on a labeling inconsistency worth knowing about below.
- A simple, two-ingredient capsule. Veggie capsule (hypromellose) and rice flour, nothing else added.
- Vegan, Non-GMO, gluten-free, and gelatin-free , stated plainly on the label.
- Third-party tested , made in a cGMP-compliant U.S. facility.
- Meaningfully cheaper per day than the alternative we carry. Roughly the same active dose, at under half the daily cost. Worth knowing if price matters to you as much as brand does.
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.
We carry two magnesium L-threonate products, and we think you should know exactly what separates them, because it isn’t the dose. Both deliver essentially the same amount of elemental magnesium (144 mg here, 145 mg on the other) from the same patented Magtein ingredient. What actually differs is price, capsule count, and which brand’s name is on the label. If you want the practitioner-channel brand or a slightly simpler excipient profile, that other option exists. If you want the same active ingredient at meaningfully less per day, this is it.
On the mechanism itself: Magtein is a patented form of magnesium L-threonate developed by MIT researchers, built around research suggesting it reaches brain tissue more effectively than other magnesium forms. We’d stop short of calling it the only form that does this, since that’s a stronger claim than the evidence fully supports, but the underlying research (animal studies showing higher brain magnesium levels, with smaller human trials on sleep and cognitive outcomes) is real and worth knowing about honestly rather than oversold.
One more thing worth flagging plainly, since we were asked to look closely at the numbers on this one: some of this brand’s own marketing copy describes “ninety pills for a one month supply.” That doesn’t match this specific 180-count product. The supplement facts panel here states 60 servings at 3 capsules each, which is 180 capsules and a genuine 2-month supply at the standard daily serving. We’re giving you the number that matches the actual label on this bottle, not the marketing copy, which looks like it was written for a different size in the same product line and never updated for this one.
Product Details
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A quick, honest note on the numbers
Since the dosing math is worth getting right: this bottle contains 180 veggie capsules. The label states a serving size of 3 capsules and 60 servings per container, which checks out (3 x 60 = 180). At the standard 3-capsule daily serving, that's a 60-day, or 2-month, supply, not the "one month supply" language that appears in some of this product's own marketing copy elsewhere. That description appears to be left over from a smaller 90-count version of this same product and doesn't reflect what's actually in this bottle. Each 3-capsule serving delivers 144 mg of elemental magnesium from 2,000 mg (2 g) of Magtein magnesium L-threonate, which is the number that matters for comparing this against any other magnesium product, including the other one we carry.
What is in the capsule, and why
One active ingredient: magnesium L-threonate, standardized to the patented Magtein form, at 2,000 mg per serving. The only other ingredients are the veggie capsule shell itself and a small amount of rice flour used as a flow agent during manufacturing.
Why this specific form of magnesium
Magnesium L-threonate was developed specifically around research suggesting it crosses into brain tissue more readily than other magnesium forms like oxide, citrate, or even glycinate. The foundational research, conducted in animals, found it raised brain magnesium levels and improved learning and memory measures more than other magnesium compounds tested alongside it. That's a meaningful, well-reasoned mechanism. It is not the same as a large, settled body of human clinical trials, and we'd rather tell you that directly than let a confident-sounding ingredient story stand in for it.
What the human evidence adds
Human research specifically on magnesium L-threonate is smaller in scale, generally focused on older adults or people with sleep or memory complaints, looking at outcomes like sleep quality and working memory. Some trials report real improvement. The evidence base is genuinely promising and still growing, not the decades-deep research history something like caffeine and theanine has.
How this compares to our other magnesium L-threonate
Dose for dose, these two products are close to identical: 144 mg versus 145 mg of elemental magnesium, both sourced from 2 g of the same patented Magtein ingredient. The meaningful differences are price per day, capsule count, and a slightly different excipient list (this one uses just a veggie capsule and rice flour; the other includes a couple of additional flow agents). Neither difference changes the active dose you're getting.
Who it tends to suit
- Anyone who wants the Magtein-specific cognitive and sleep angle without paying a premium for a specific brand name.
- People restocking a magnesium L-threonate habit who want a larger supply at a lower per-day cost.
- Anyone who prefers a shorter ingredient list on the capsule itself.
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, same caveat as any magnesium L-threonate product.
- 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 144 mg of elemental magnesium. Take it all at once or split it across the day, whichever fits your routine.
If sleep is your main goal, an evening dose is a reasonable default. Magnesium's role in GABA and melatonin pathways makes taking it in the evening sensible, though there's no strict requirement to time it that way for the cognitive benefits specifically.
Give it real time. The research behind this ingredient generally used several weeks of consistent daily use before measuring outcomes. A few days is not a fair test; give it at least three to four weeks 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 around 144 to 145 mg of elemental magnesium; there's no evidence that exceeding it improves the cognitive or sleep benefits further.
Third Party Lab Testing
- Third-party tested, verified independently rather than taken on the brand's word alone.
- Manufactured in the USA in a cGMP-compliant facility.
- Verified Non-GMO, gluten-free, and gelatin-free, stated claims rather than assumptions.
- 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.
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 Veggie Capsules - Servings Per Container: 60
| Per 3 veggie capsules | Amount | % DV |
|---|---|---|
| Magnesium (from 2,000 mg magnesium L-threonate) (Magtein®) | 144 mg | 34% |
Other Ingredients: Veggie capsule (hypromellose), rice flour.
Free from: Gluten. Gelatin. GMOs (verified).
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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