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MusculoskeletalCardiovascularNootropic

Magnesium (Glycinate/Threonate)

Research suggests these highly bioavailable magnesium forms may support sleep quality, cognitive function, and cellular energy metabolism.

Human Trials

24

1,847 participants

Risk Level

Low Risk

Monthly Cost

$15$45 /month

Premium chelated forms cost more than basic magnesium oxide

Quick Facts

Category
Supplement
Research Field
Supplements
Evidence Grade
B – Moderate
Risk Level
Low
Monthly Cost
$15 – $45
Human Trials
24

Typical Dose

300–400 mg elemental magnesium/day

Range

200–500 mg/day

Timingevening with food (promotes relaxation and sleep)
Formglycinate or malate (best absorbed, least GI side effects); avoid oxide
Notes~50% of people are magnesium deficient. Oxide form has <5% absorption – avoid. Glycinate is best for sleep/anxiety; malate for energy/muscle; threonate for brain (crosses BBB).

For informational purposes only – not medical advice. See disclaimer

Research Velocity

+10%
156 publications in the last 12 months · steady increase in publications

Mechanism of Action

Magnesium glycinate and threonate are chelated forms designed for enhanced absorption and bioavailability compared to standard magnesium salts. Research indicates magnesium acts as a cofactor for over 300 enzymatic reactions, supporting ATP synthesis, protein synthesis, and neurotransmitter regulation. Magnesium threonate specifically may cross the blood-brain barrier more effectively, potentially supporting synaptic plasticity and memory formation.

Overview

Magnesium glycinate and magnesium L-threonate represent advanced chelated forms of this essential mineral, designed to overcome the poor absorption rates associated with traditional magnesium supplements. Research indicates that magnesium deficiency affects nearly half the adult population, potentially contributing to sleep disturbances, muscle tension, and suboptimal cellular energy production. These chelated forms bind magnesium to amino acids, which studies suggest may improve gastrointestinal tolerance and bioavailability.

Clinical trials have examined magnesium supplementation's effects on sleep quality, with studies suggesting improvements in sleep efficiency and reductions in cortisol levels. Magnesium L-threonate, developed at MIT, has shown particular promise in animal studies for crossing the blood-brain barrier and potentially supporting synaptic density and memory formation. Human research on various magnesium forms indicates potential benefits for mood regulation, with some studies suggesting improvements in mild-to-moderate depression scores.

While generally well-tolerated, higher doses may cause gastrointestinal effects in sensitive individuals. Research suggests starting with lower doses (200-400mg elemental magnesium daily) and gradually increasing as tolerated. The chelated forms typically cause fewer digestive issues compared to magnesium oxide or sulfate, making them suitable for long-term supplementation protocols focused on optimizing cellular function and sleep quality.

Known Interactions

  • May reduce absorption of tetracycline and fluoroquinolone antibiotics when taken simultaneously
  • Can enhance the effects of muscle relaxants and blood pressure medications
  • High doses may interfere with absorption of other minerals like calcium and zinc
  • May increase excretion of lithium, potentially reducing its effectiveness

Legal Status by Country

📍

Your country (United States)

OTC
✈️

Available without prescription in:

Australia, Brazil, Canada, China, Colombia, Germany, India, Israel, Japan, Mexico, Netherlands, Panama, Russia, South Korea, Switzerland, Thailand, Turkey, UAE, United Kingdom, United States

Australia
OTC
✈️Brazil
OTC
Canada
OTC
China
OTC
✈️Colombia
OTC
Germany
OTC
✈️India
OTC
✈️Israel
OTC
Japan
OTC
✈️Mexico
OTC
Netherlands
OTC
✈️Panama
OTC
Russia
OTC
✈️South Korea
OTC
Switzerland
OTC
✈️Thailand
OTC
✈️Turkey
OTC
✈️UAE
OTC
United Kingdom
OTC
📍United States
OTC

📍 = your selected country · ✈️ = medical tourism destination · Always verify current local regulations before travel.

Key Research

Last verified: 2026-03-16