Pure Encapsulations Magnesium Glycinate
Best for: a glycinate option listed in the magnesium guide
Magnesium Dose Calculator
Choose a goal to see a common studied amount and how it is expressed. Magnesium dosing is not based on body weight here.
How to read your result
- Start with Your dose and How to split; this is a comparison point, not a prescription.
- Check the Evidence range / upper limit and safety cautions.
- Weight, age and sex are not dose inputs unless the result explicitly says they are.
Estimate
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Your dose
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How to split
See your serving pattern
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Evidence range / upper limit
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Review the safety notes
Is this based on your weight? Enter a valid weight to see whether this estimate uses it.
Evidence grade B
Medication & safety cautions
- Kidney disease can impair magnesium clearance; ask your clinician before supplementing.
- Separate magnesium by at least 2 hours from tetracycline or quinolone antibiotics, bisphosphonates and levothyroxine; confirm the interval with a pharmacist.
How this estimate works
Sleep goal: 300 mg elemental magnesium as glycinate about 1 hour before bed. Brain goal: 2,000 mg magnesium L-threonate compound (~144 mg elemental), split as 1,000 mg morning and evening. Blood-pressure/general goal: 300 mg elemental with dinner. Supplemental elemental magnesium has a 350 mg/day NIH upper limit; higher supplemental amounts mainly increase loose stools. Dietary RDA is 400–420 mg/day for men, 310–320 mg/day for women, and 350–360 mg/day in pregnancy.
Key studies
- Zhang et al. 2016 — Hypertension · randomized-trial meta-analysis
- Abbasi et al. 2012 — Journal of Research in Medical Sciences · older-adult insomnia trial
- Zhang et al. 2022 — Nutrients · magnesium L-threonate cognitive-function study
Magnesium forms guide · Intervention evidence
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Double Wood Magnesium L-Threonate (Magtein)
Best for: comparing an L-threonate product discussed in the guide
Frequently asked questions
Does the calculator show elemental magnesium?
Sleep and blood-pressure options show elemental magnesium. The brain option shows the L-threonate compound amount and its approximate elemental amount separately.
What is the supplemental upper limit?
The NIH upper limit for supplemental magnesium is 350 mg/day of elemental magnesium for adults; it does not include magnesium from food.
Should I take magnesium with medicines?
Magnesium can reduce absorption of some medicines. Keep the spacing specified by your prescription and ask a pharmacist about antibiotics, bisphosphonates or levothyroxine.
Educational tool, not medical advice. Check with your doctor, especially if you take medication.