Nutricost Magnesium L-Threonate (Magtein)
by Nutricost
"Magtein magnesium L-threonate — the only magnesium form proven to cross the blood-brain barrier for cognitive support"
Overview
Nutricost Magnesium L-Threonate provides 2000mg of Magtein (magnesium L-threonate) per 3-capsule serving, delivering 144mg of elemental magnesium. Magnesium L-threonate is the only magnesium form demonstrated in research to effectively cross the blood-brain barrier and increase brain magnesium levels. Developed at MIT, Magtein has been studied for its ability to enhance synaptic density, improve learning and memory, and support cognitive function. It gained mainstream attention through Dr. Andrew Huberman's recommendations.
Key Ingredients
| Ingredient | Amount |
|---|---|
| Magtein (Magnesium L-Threonate) | 2000 mg |
| Elemental Magnesium | 144 mg |
Pros & Cons
What We Like
- Magtein (patented, MIT-developed)
- Crosses blood-brain barrier
- 7,800+ reviews
- Cognitive support
- Budget Magtein option
What Could Be Better
- 3 capsules per serving
- Low elemental magnesium (144mg)
- 30 servings only
- More expensive than basic magnesium
Who Is This For?
Best For
- Brain health and cognition
- Memory support
- Those following Huberman protocols
- Sleep quality (brain relaxation)
Not Ideal For
- Those wanting high elemental magnesium
- Budget seekers
- Those wanting muscle/cramp relief
- Those wanting fewer pills
Our Verdict
Nutricost Magtein is the budget brain magnesium — the MIT-developed form that crosses the blood-brain barrier at a fraction of the price of Life Extension Neuro-Mag. Essential for cognitive-focused magnesium supplementation.