Elemental magnesium absorption from magnesium oxide
Oral magnesium oxide has low fractional absorption (approximately 4%). RTI description of bioavailability study
Elemental magnesium dose in a 400 mg magnesium oxide product
A 400 mg magnesium oxide product is equivalent to approximately 240 mg elemental magnesium. [1]
Absorbed elemental magnesium after a 400 mg magnesium oxide dose
Absorbed elemental magnesium is approximately 9.6 mg (calculated as 240 mg × 0.04). RTI description of ~4% fractional absorption [1]