Magnesium Glycinate (Magnesium Bisglycinate) Dose for Sleep
Oral magnesium glycinate is typically dosed based on the amount of elemental magnesium provided by the product label. A randomized, placebo-controlled trial in adults with self-reported poor sleep used 250 mg of elemental magnesium daily as magnesium bisglycinate for 4 weeks. [1]
Dose Used in Sleep Studies
- 250 mg elemental magnesium once daily as magnesium bisglycinate (often sold as a glycinate/bisglycinate form) is the primary studied dose for poor sleep in a randomized, placebo-controlled trial. [1]
Dose Conversion from Product Label
- Supplement labels should be checked for elemental magnesium (mg) rather than the total compound mass (mg of “magnesium glycinate/bisglycinate” compound). [2]
Timing for Sleep
- The available trial evidence for sleep dosing in adults with poor sleep is limited to the dosing regimen used in the trial protocol. [1]
Safety Considerations and Upper Limit
- The NIH Office of Dietary Supplements lists a Tolerable Upper Intake Level (UL) of 350 mg/day for supplemental magnesium (from supplements and medications). [2]
- Higher supplemental magnesium doses increase the likelihood of adverse effects such as diarrhea. [2]
Practical Dose Range Used in Clinical Products (Evidence-Limited)
- The evidence-supported sleep dose is 250 mg/day elemental magnesium from magnesium bisglycinate used in a randomized controlled trial. [1]
Common Pitfalls in Magnesium Glycinate Dosing
- Overdosing can occur when “mg of magnesium glycinate” is used instead of “mg of elemental magnesium.” [2]
- Excess total magnesium from multiple products can exceed the NIH UL for supplemental magnesium. [2]
Medication-Related Considerations
- The NIH Office of Dietary Supplements notes that magnesium supplements can interact with certain medications (including by affecting absorption), so timing relative to interacting medications is important. [2]
Recommended Sleep Dose
The recommended sleep dose supported by randomized trial evidence is 250 mg/day of elemental magnesium taken as magnesium bisglycinate. [1]