Compound Deep-Dive

Tier 1: MainstreamThe premier choice for brain-specific magnesium benefits, provided the high price point is acceptable.

Magnesium L-Threonate

MagteinMagnesium ThreonateMgT

The gold standard for brain magnesium.

Hype Risk

4/10

Noticeability

7/10

Evidence Tier

Moderate

Cost / Month

~$40

Overpriced for muscle

What it's actually good for

Focus

Research Supported

Shown to improve cognitive age and memory in older adults.

Sleep

Research Supported

Improves subjective sleep quality and REM duration in recent trials.

Mood

Mixed Evidence

Some reports of anxiety reduction, but evidence is less robust than for cognition.

Energy: neutralMuscle: neutralRecovery: neutralLongevity: alignedImmunity: neutral

How it works

Magnesium L-Threonate is a specialized form of magnesium designed to cross the blood-brain barrier more effectively than other salts. Clinical evidence suggests it may improve cognitive function, memory, and sleep quality in adults, though many studies are manufacturer-funded.

Acts as an NMDA receptor antagonist and increases synapse density in the hippocampus by raising brain magnesium levels via specific transporters.

Safety

Generally well-tolerated with fewer GI side effects than citrate.
May cause vivid dreams in some users.
Monitor for excessive drowsiness if taken during the day.

The full StackRoast report adds

The exact dose, timing, and effective range to actually run it at
Where people go wrong with it — the dose-creep and timing traps
What Magnesium L-Threonate clashes with or duplicates in your stack
Which brands are actually worth buying

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Community Reality Check

Distilled from 850 threads

Confidence: high

What users report

Mental clarity
Vivid dreams
Deep sleep
Reduced brain fog

The catch

Expensive
Headaches
Withdrawal-like symptoms (anecdotal)

Side effects reported

Vivid dreams
Mild headache
Drowsiness

https://www.reddit.com/r/Nootropics/https://www.reddit.com/r/Supplements/

The Receipts

9 sources— studies, videos & links

Videos

Best Magnesium Supplements for Sleep & Brain Health

Huberman Lab

Dr. Huberman explains why Threonate is his preferred form for sleep and cognitive function.

Peter Attia's Nighttime Supplement Routine

Peter Attia MD

Dr. Attia discusses his use of Threonate for cognitive longevity.

Papers

Liu et al. (2016)rct2016

Found that Magtein improved cognitive ability and reduced brain age in older adults.

Zhang et al. (2024)rct2024

Demonstrated improvements in sleep quality and daytime functioning using Oura ring data.

Creators

Andrew Huberman

YouTube

Neurobiology professor at Stanford who popularized the sleep cocktail including Threonate.

Peter Attia

YouTube

Longevity-focused physician who uses Threonate in his personal and clinical protocols.

Clinical Sources

Liu et al. (2016) - Cognitive Studyclinical Examine - Magnesium L-Threonateofficial NIH ODS - Magnesiumofficial

Taking Magnesium L-Threonate in a stack? Find out if the combination actually makes sense.

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