Magnesium supplements are used to prevent and treat magnesium deficiency and may help with conditions such as migraine headache, menstrual pain, PMS, and pregnancy-related leg cramps. But among the magnesium supplements selected for review by ConsumerLab.com, 25% did not meet quality standards according to our magnesium tests.
Our review revealed that one magnesium supplement contained only 45.4% of its labeled amount of magnesium, despite boasting a "GMP" (Good Manufacturing Practices) seal on its label. Another supplement provided only 28.8% of its promised magnesium. Lead contamination was discovered upon review of a third product.
You must subscribe to get the full test results for magnesium supplements along with ConsumerLab.com recommendations and quality ratings. You will get results for twelve supplements selected by ConsumerLab.com and for eight others that passed voluntary certification testing, as well as information about two supplements similar to ones that passed testing.
In this comprehensive report, you'll discover:
- Which magnesium supplements failed testing and which passed
- Direct comparisons and quality ratings of magnesium supplements
- The pros and cons of different forms of magnesium (such as citrate, gluconate, hydroxide, oxide, and amino acid chelates) and which may be best for you
- Dosage for specific uses
- Concerns, cautions, and drug interactions
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