Magnesium L-Threonate

Nootropic

Grade B

💊 1000-2000 mg daily (providing ~100-150mg Mg)🎯 4 primary uses🔗 2 synergies⚠️ Review warnings

Overview

Form of magnesium specifically designed to cross the blood-brain barrier. Supports brain magnesium and synaptic plasticity.

Primary Uses

Brain magnesiumMemorySleepSynaptic plasticity

Frequently Asked About Magnesium L-Threonate

How much Magnesium L-Threonate should I take?

The typical effective range is 1000-2000 mg daily (providing ~100-150mg Mg). Individual needs vary based on age, body weight, diet, and goals — start at the lower end and adjust based on response. Always consult a healthcare provider before starting a new supplement.

When is the best time to take Magnesium L-Threonate?

Evening for sleep; any for cognition. Consistency matters more than perfect timing — pick a daily anchor (e.g. with breakfast or before bed) and stick with it.

Should I take Magnesium L-Threonate with food?

Optional.

Does Magnesium L-Threonate interact with medications?

Yes — known interactions include Standard magnesium interactions. If you take any prescription medication, talk to your doctor or pharmacist before starting Magnesium L-Threonate.

What does Magnesium L-Threonate pair well with?

Magnesium L-Threonate stacks well with Other cognitive supplements and L-theanine — these combinations either improve absorption or work synergistically toward common goals.

Who should not take Magnesium L-Threonate?

Magnesium L-Threonate should be avoided or used with caution by people with Severe kidney disease. Pregnant or breastfeeding women should consult a healthcare provider before use.

What are the side effects of Magnesium L-Threonate?

Most people tolerate Magnesium L-Threonate well. The most commonly reported side effects are Drowsiness and GI upset. Side effects are usually dose-dependent — lowering the dose often resolves them.

Dosage

Typical range

1000-2000 mg daily (providing ~100-150mg Mg)

Timing

Evening for sleep; any for cognition

With food

Optional

Duration

Weeks for cognitive effects

Special Populations

Cognitive aging, sleep

Research & Studies

Search the literature now

We haven’t curated landmark studies for Magnesium L-Threonateyet — one-click into the primary literature here. PubMed (RCTs) is usually the highest-signal starting point.

Search Magnesium L-Threonate research

PubMed (RCTs) ↗Randomized trials PubMed (all) ↗Full literature Cochrane Reviews ↗Systematic reviews Examine.com ↗Research summaries

Browse all curated studies →

Mechanism of Action

• Crosses BBB efficiently
• Increases brain magnesium
• Supports NMDA receptor function

Evidence Quality

Evidence Grade B

Brain-penetrating magnesium form

Safety & Contraindications

Serious Warnings

• None

Contraindications

• Severe kidney disease

Common Side Effects

• Drowsiness
• GI upset

Pregnancy & Breastfeeding

Consult healthcare provider

Liver & Kidney Notes

Caution severe kidney disease

Interactions

💊 Medications

• Standard magnesium interactions

🧪 Supplements

• Can be part of total Mg intake

🍽️ Food & Alcohol

• No interactions

Stacking & Synergies

Pairs Well With

Other cognitive supplementsL-theanine ↗

Avoid Combining With

None

Best Goal Synergies

Cognitive agingSleep

Buying Guide

What to Look For

• Magtein branded

Standardization Markers

Magtein brandMg content

Adulteration risk

Low

Practical Notes

• Most brain-specific magnesium
• Good for aging cognition

Related Guides

In-depth guides covering Magnesium L-Threonate — protocols, comparisons, and use cases.

Best Magnesium Supplements↗

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Last reviewed: August 2026 by the Formulate Research Team. Sources cited above; methodology and scoring criteria published here.

Cite this page

Formulate Research Team. (2026, August). Magnesium L-Threonate — Evidence-Based Supplement Guide. Formulate Supplement Encyclopedia. https://app.formulate-health.app/learning/supplements/magnesium-l-threonate

Educational content based on published research and our scoring methodology. Not medical advice — consult a qualified healthcare provider before starting, stopping, or changing supplements, especially if you take medications, are pregnant, or have a medical condition.