Magnesium Dosage

Magnesium supplementation for severe leg cramps may take several weeks before providing noticeable relief. The RDA for magnesium is approximately 400–460 mg per day. Magnesium doses should be split into increments of no more than 300–400 mg at one time, spread throughout the day. The article says research on several conditions has used magnesium doses above the RDA. The article gives 600 mg to 1,400 mg per day as the typical therapeutic intake range. People with significant deficiencies or medical conditions may require therapeutic magnesium doses of 800–1,600 mg per day. The article recommends distributing magnesium intake across multiple daily doses instead of taking one large dose. The article states that studies showing meaningful effects have used up to 800 mg per day for weeks or longer. The article presents 600 mg per day for more than one month as a minimum corrective dose described by one clinical group. RDAs were established about 100 years ago to prevent overt deficiency disease, not to optimize health or produce therapeutic outcomes.