Magnesium Oxide

Magnesium oxide's raw material cost is approximately $5 per kilogram, making it essentially waste sold as a supplement. Reaching bioavailable equivalence from magnesium oxide would require approximately 20 capsules (8,000 mg), a quantity that causes severe gastrointestinal distress. Because magnesium oxide is the most-researched form, studies using it incorrectly lead physicians to conclude magnesium supplementation is ineffective. Magnesium oxide has only a 4% absorption rate, meaning 96% passes through the body unused.