Finally, magnesium supplements have been suggested for reducing complications of pregnancy such as preeclampsia, but a double-blind study of 400 pregnant women found no benefit. A recent double-blind study found that regular use of magnesium helps prevent migraine headaches. Similar results have been seen in other, smaller double-blind studies. 32 Kidney Stones Magnesium inhibits the growth of calcium oxalate stones in the test tube 33 and decreases stone formation in rats. However, human studies have had mixed results.
Magnesium works with calcium and potassium to regulate blood pressure.
The researchers reported evidence of reduced levels of prostaglandin F 2 alpha, a hormone-like substance involved in pain and inflammation. In general, magnesium appears to be quite safe when taken at recommended dosages. The most common complaint is loose stools. Maximum safe dosages have not been established for young children or women who are pregnant or nursing. Magnesium can interfere with the absorption of antibiotics in the tetracycline family.