Magnesium · Capsules
Magnesium Glycinate
by Pure Encapsulations
Magnesium glycinate at 120 mg per capsule with no blend, so the label can be checked against what the research studied. Costs more per milligram than a bulk powder.
Best for
- Adults who want to build their dose up one capsule at a time
- Anyone who gets loose stools from higher-dose magnesium forms
Not for
- Buyers who want the lowest cost per milligram of elemental magnesium
Where it fits in the program
Magnesium
- Primary role
- Muscle function and energy
- Contribution to healthy aging
- Supports normal muscle contraction, nerve signaling and cellular energy production.
The rest of the program
Each supplement covers a different job. You only need the ones that match your goals.
- Strength: Lifting after 40? Meet one of the most-studied supplements for strength. Creatine
- Calm: Still wired at 10pm? Meet the compound from tea that people take to wind down. L-theanine
What is in it
| Ingredient | Per serving | Dose used in research |
|---|---|---|
| Magnesium (as magnesium glycinate) | 120 mg | Supplemental intake studied up to 350 mg/day, the US tolerable upper limit for supplemental elemental magnesium |
Serving size: 1 capsule
What the research says
Supports normal muscle and nerve function
Robust evidenceMagnesium is required for muscle contraction and nerve signaling, and most US adults do not meet the recommended daily intake from food alone.
Supports normal energy metabolism
Robust evidenceMagnesium is a cofactor for the enzymes that convert food into usable cellular energy.
May support sleep quality when magnesium intake is low
Early evidenceA 7-week randomized trial in adults over 50 with poor sleep found sleep scores improved on magnesium citrate, but improved by a similar amount on the placebo too, so the trial could not show magnesium caused the change.
What the grades mean is explained in how we choose.
Quality and testing
- Brian found no independent certification mark (such as NSF Certified for Sport) for this product.
- The brand's own testing claims have not been checked against its site yet.
See what the brand itself claims about this ingredient, and how Brian grades each claim
Safety
- Do not take magnesium supplements if you have kidney disease unless your doctor advises it.
- Separate from some antibiotics and osteoporosis medicines by a few hours; ask your pharmacist.
- Higher doses of most magnesium forms can loosen stools; glycinate is one of the gentler forms.
Pros and cons
Pros
- Single ingredient, easy to check against the label
- 120 mg a capsule makes it easy to adjust your dose
- Same strength sold in both the US and the UK
Cons
- Higher cost per milligram of elemental magnesium than a bulk glycinate powder
- No independent certification mark found
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. This page is general information, not medical advice. Talk to your doctor before starting a supplement, especially if you are pregnant, have a medical condition or take medication.
Pure Encapsulations Magnesium Glycinate
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