If your goal is magnesium for memory and focus, this is the form built for exactly that. **Magnesium L-threonate** is the one type of magnesium that meaningfully crosses into your brain, and at 2g of Magtein per serving you're sitting right at the dose used in human cognitive trials.
Magnesium itself has strong clinical backing for sleep and a calmer nervous system, which is what you're buying it for here. The brain-specific research behind the threonate form is newer and smaller, so treat the cognitive payoff as promising rather than settled.
The real tradeoff is elemental magnesium: those 2g of Magtein deliver just 147mg of actual magnesium per serving, tuned for the brain rather than topping up your whole-body magnesium or easing muscle cramps. Reaching that dose means 3 capsules daily, best taken in divided doses through the day.
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What it does
Magnesium
Mixed formsGrade —
Supports normal muscle and nerve function and helps the body produce energy.
Ingredients (2)
Other ingredients
MaltodextrinBinder
Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
GelatinCapsule
Protein derived from collagen, used in traditional capsule shells
Lab testing
How to take it
With or without food
Space it a couple of hours from Iron and Calcium
On the label
3 capsules daily, preferably in divided doses. Start with 1 capsule daily and gradually increase to 3 capsules daily.
Price check
$60.19
$1.00 / serving
Pricier than 96% 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.
Not medical advice. Consult your healthcare professional.