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
Monthly Cost
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
For informational purposes only – not medical advice. See disclaimer
Research Velocity
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)
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
📍 = your selected country · ✈️ = medical tourism destination · Always verify current local regulations before travel.
Key Research
- 2010
Cognitive enhancement with magnesium L-threonate
- 2017
Mood and neurological effects
- 2014Oral magnesium supplementation reduces c-reactive protein levels in subjects with prediabetes and hypomagnesemia: a clinical randomized double-blind placebo-controlled trial
Anti-inflammatory effects
- 2017Magnesium intake and sleep disorder symptoms: Findings from the Jiangsu Nutrition Study of Chinese adults
Population-level sleep benefits
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Last verified: 2026-03-16