Magnesium oxide doesn’t absorb into the bloodstream as easily as other magnesium compounds, and may cause, “gastrointestinal upset in some individuals,” according to Dr. Pearlman.

Several forms of magnesium are available, each varying in composition and effects on health. For example, magnesium glycinate is often used to help manage stress, whereas magnesium oxide is better ...

Magnesium oxide is one of the most common and least expensive forms of magnesium for constipation. But there are others, including magnesium citrate or magnesium sulfate (Epsom salts).

Studies suggest that magnesium ions provided by magnesium oxide interrupt the brain signals that may cause migraine. A dose of 400–500 milligrams per day may be required to be effective.

"Magnesium is important for so many aspects of health. The mineral is involved in more than 300 enzymatic reactions in the body. It's important for bone health, helping to keep your blood sugar ...