Life Extension·minerals
Neuro-Mag L-Threonate
Brain-crossing magnesium
Magnesium L-threonate (Magtein®) is the only form of magnesium clinically shown to cross the blood-brain barrier. Built to support working memory, cognitive function, and quick thinking.
- ◆Magtein® magnesium L-threonate
- ◆Supports working memory & cognition
- ◆90 vegetarian capsules
- ◆Non-GMO, gluten-free, vegetarian
Shipping & Returns
Ships within 1–2 business days from our facility in the USA. Free shipping on orders over $60. Returns accepted for unopened bottles within 30 days.
How to Use
Take 1–2 capsules daily, with food or on an empty stomach, or as directed by your healthcare practitioner. 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.
Cold-brewed
14-day extraction — no heat damage
Organic herbs
USDA-aligned named-farm sourcing
Amber glass
Light-blocking to preserve actives
Third-party tested
Heavy metals, microbials, potency
Related guides
Read up before you buy.
Journal · 7 min read
Magnesium Forms Compared: Glycinate, Threonate, Citrate, Oxide, Malate
Magnesium deficiency is one of the most common nutrient gaps in the US — and the form you take determines whether you get the benefit you're after or just an upset stomach. Here's the full breakdown.
Comparison · 7 min read
Best Magnesium for Sleep: Threonate, Glycinate, Citrate & Oxide Compared
Three of our magnesium options — Life Extension Neuro-Mag (threonate), Life Extension Magnesium Caps (three-form), and Solaray Cal-Mag Citrate — head-to-head for sleep, cognition, and daily mineral support.
Comparison · 4 min read
Life Extension Neuro-Mag L-Threonate vs Thorne Magnesium CitraMate + D-5000
Life Extension Neuro-Mag L-Threonate compared with Thorne Magnesium CitraMate + D-5000 on dose, price, reviews, and clinical fit.
