Question: what is the daily requirement for magnesium?
Answer: General: The daily Recommended Dietary Allowances (RDA) for elemental magnesium are: 19-30 years, 400 mg (men) and 310 mg (women); 31 years and older, 420 mg (men) and 320 mg (women). For pregnant women age 14-18 years, the RDA is 400 mg; 19-30 years, 350 mg; 31-50 years, 360 mg.