Magnesium Glycinate vs Magnesium Threonate
Two of the most bioavailable magnesium forms, each with distinct strengths. Glycinate is prized for relaxation and sleep, while threonate uniquely crosses the blood-brain barrier for cognitive benefits.
Magnesium (Threonate/Glycinate)
Highly bioavailable magnesium in threonate or glycinate form for superior absorption. Supports deep sleep quality, cognitive function, and nervous system relaxation. Magnesium threonate is particularly valued for its ability to cross the blood-brain barrier.
86 experts recommend
Magnesium (Threonate/Glycinate)
Highly bioavailable magnesium in threonate or glycinate form for superior absorption. Supports deep sleep quality, cognitive function, and nervous system relaxation. Magnesium threonate is particularly valued for its ability to cross the blood-brain barrier.
86 experts recommend
Head-to-Head Comparison
| Factor | 🧲 Magnesium Glycinate | 🧲 Magnesium Threonate |
|---|---|---|
| Primary Benefit | Sleep quality, muscle relaxation | Cognitive function, brain health |
| Absorption | Excellent bioavailability | Excellent, crosses blood-brain barrier |
| Best Time to Take | Evening / before bed | Morning or any time |
| Typical Dose | 200-400 mg elemental Mg | 144 mg elemental Mg (as Magtein) |
| GI Tolerance | Very well tolerated | Very well tolerated |
| Bonus Compound | Glycine (sleep amino acid) | L-threonate (brain penetration) |
| Expert Consensus | 86 experts | 86 experts |
The Verdict
For sleep and general relaxation, magnesium glycinate is the top choice due to its calming glycine component and excellent absorption. For cognitive function and brain health specifically, magnesium threonate (Magtein) is preferred because it is the only form proven to increase brain magnesium levels. Many experts take both — threonate in the morning, glycinate at night.
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Frequently Asked Questions
Can I take both magnesium glycinate and threonate?
Yes. Many longevity experts stack both forms — threonate for daytime cognitive benefits and glycinate before bed for sleep. Just keep total elemental magnesium intake under 400-500 mg daily to avoid GI issues.
Which magnesium is best for anxiety?
Magnesium glycinate is generally preferred for anxiety because the glycine component itself has calming neurotransmitter effects. However, magnesium threonate may help with anxiety that stems from cognitive overload due to its brain-specific effects.
Why is magnesium threonate so expensive?
Magnesium L-threonate is patented as Magtein and requires a more complex manufacturing process. The premium reflects both the patent licensing and the unique brain bioavailability that no other magnesium form offers.
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