Magnesium citrate and magnesium oxide are two of the most common ... of magnesium supplement and the severity of constipation. In general, a daily dose of 400-800mg of magnesium is recommended ...
The study showed that treatment with 1.5 grams (g) of magnesium oxide per day for 28 days was as effective as daily treatment with 1 gram of senna for improving symptoms of chronic constipation.