Jarrow Formulas Magnesium L-Threonate
- Magnesium
- Capsule
- Magnesium
- 90
If memory or cognitive support is the specific goal, the L-threonate form sets this apart from ordinary magnesium supplements, though there is no review data here to confirm real-world results.
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How it ranks among the 108 magnesium we track
4.6★ across 4,700 Amazon ratings, Bayesian-smoothed toward the category average.
4,700 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
8,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 108 magnesium we track - how the scorecard works · full magnesium data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Jarrow Formulas MagMind is a magnesium L-threonate (Magtein) capsule supplement sold as a 90 count bottle, positioned as a brain and memory support product rather than a general mineral supplement. It is vegan and unflavored, offering up to a 30 day supply per bottle.
Magnesium L-threonate is a specific, patented form (Magtein) that differs from the cheaper magnesium oxide or citrate found in most general mineral supplements, and it is marketed specifically for cognitive support rather than muscle or sleep use. No seller description or customer reviews accompanied this listing, so claims here are limited to what the label states. Buyers researching magnesium for memory support should note this is a narrower use case than a typical multivitamin-aisle magnesium pill.
- Magnesium L-threonate (Magtein) form
- 90 vegan capsules per bottle
- Up to a 30 day supply
- Unflavored
Who it's for
Aimed at adults specifically looking for the L-threonate form of magnesium studied for cognitive support, not people who just want a general, cheaper magnesium supplement for muscle cramps or sleep. Vegans are covered since the capsules are vegan.
Strengths and trade-offs
Drawn from this product's published specifications.
- Uses the L-threonate (Magtein) form studied for brain support
- Up to a 30 day supply per bottle
- No customer reviews to confirm real-world effects
- Specialty magnesium form typically costs more than standard magnesium
- No seller description provided beyond label attributes
Performance notes
Magnesium L-threonate was developed because this particular magnesium salt crosses into the brain more readily than common forms like oxide or citrate, which is the basis for its cognitive support positioning. A 90 capsule bottle taken at label-directed serving sizes provides up to a 30 day supply. Being unflavored and vegan, it fits into most dietary patterns without additional considerations.
Specifications
| Brand | Jarrow |
|---|---|
| Form | Capsule |
| Supplement Type | Magnesium |
| Count | 90 |
| Benefits | Energy Management |
| Flavor | Unflavored |
| Diet | Vegan |
How it compares
This product against the closest alternatives we track in magnesium.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Jarrow Formulas Magnesium L-ThreonateThis product | 4.6 / 5 | 4,700 | 4.6 / 5 |
| Nature Made Magnesium Oxide 250 mgNATURE | 4.7 / 5 | 34,500 | 4.6 / 5 |
| NaturalSlim MagicMag Magnesium Citrate Powder for StressNaturalSlim | 4.7 / 5 | 26,700 | 4.6 / 5 |
| NOW Supplements, Magnesium Citrate, Enzyme Function*, Nervous System Support*, 120 Veg…Now | 4.7 / 5 | 25,200 | 4.6 / 5 |
| Life Extension Magnesium CapsLife | 4.7 / 5 | 16,700 | 4.6 / 5 |
Similar magnesium from other brands
Questions about the Jarrow magnesium
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What type of magnesium is in Jarrow Formulas MagMind?
It uses magnesium L-threonate, marketed under the Magtein name, rather than magnesium oxide or citrate.
How long does one bottle of Jarrow MagMind (model MAGT) last?
The listing states up to a 30 day supply from the 90 capsule count.
Is Jarrow MagMind suitable for vegans?
Yes, the capsules are labeled vegan.