**Magtein Magnesium L-Threonate** at 2,000mg per serving (144mg elemental magnesium) — this is the exact dose used in the MIT-developed human trials studying memory and cognitive function. L-threonate is the only magnesium form shown to meaningfully raise brain magnesium levels, making this a targeted pick if your goal is cognitive support rather than general magnesium supplementation.
Your 144mg of elemental magnesium falls comfortably within the 100–400mg clinical supplemental range, and the premium form means absorption isn't a concern. The brain-specific research also gives this product relevance for sleep and stress — magnesium broadly supports nervous system relaxation, and the threonate form may offer additional benefit for mood and mental clarity.
The tradeoff is that 144mg is modest if you're looking for whole-body magnesium coverage — muscle recovery, heart rhythm, or bone support typically call for 300–400mg daily. If brain health is your priority, this delivers. If you need broader magnesium support, you'd want to supplement with an additional form.
BioStacks
Life Extension
Life Extension, Neuro-Mag, Magnesium L-Threonate, 90 Vegetarian Capsules (48 mg per Capsule)
3 Capsules · 30 servings · $1.05/serving
Best for
Ingredients (1)
Magnesium
100%Dose
144 mg
Target
100–400 mg
Form
Premium
Other Ingredients (5)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Vegetable StearateLubricant
A plant-derived salt of stearic acid (typically magnesium or calcium) used as a tablet lubricant
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
How to Take It
Best taken in the evening
Magnesium L-threonate is designed to raise magnesium in the brain — shown in animals. The human cognition trial dosed 1.5–2 g/day, usually split with a dose in the evening.
With or without food
Space it a couple of hours from Iron and Calcium
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$31.50
Pricier than 79% of 579 magnesium supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.