ConsumerLab purchased and tested 15 popular magnesium supplements, including softgels, capsules, tablets, liquids, and gummies, to help identify the best magnesium supplements, and selected its Top Pick. Magnesium supplement brands tested include Bluebonnet, BulkSupplements, Doctor’s Best, Garden of Life, GNC, Natural Vitality, NOW, Pure Encapsulations, and others.
For example, vitamin D or magnesium may be added to a calcium supplement. Vitamin D and magnesium help your body better absorb calcium. Check the list of ingredients to see what type of calcium is in the supplement and what other nutrients may have been added. This information is important if you have any health or dietary concerns.
Trying to find the best magnesium supplement? ConsumerLab tested popular forms and brands. Find out which ones passed our review and tests, which failed, and which we selected as our Top Picks. Learn which forms of magnesium are best absorbed, correct dosage, side effects, and who is most likely to need magnesium.
Diarrhea or Hypomagnesemia (low magnesium in the blood), history of or Osteoporosis (bone problem) or Seizures, history of or Systemic lupus erythematosus (SLE)—Use with caution. May make these conditions worse. Liver disease—Use with caution. The effects may be increased because of slower removal of the medicine from the body.
Could your magnesium supplement be causing diarrhea? Find out why the dose of magnesium in your supplement matters, and which forms of magnesium are less likely to cause diarrhea ConsumerLab.com's answer explains.
Too little potassium, calcium or magnesium in the diet can cause leg cramps. Medicines often prescribed for high blood pressure can cause increased urination, which may drain the body of these minerals.