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The following doses have been studied in scientific research:
ADULTS
BY MOUTH:
- 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. For lactating women age 14-18 years, the RDA is 360 mg; 19-30 years, 310 mg; 31-50 years, 320 mg. The daily upper intake level (UL) for magnesium is 350 mg for anyone over 8 years old, including pregnant and breast-feeding women.
- For constipation: 8.75-25 grams of magnesium citrate has been used, usually as 150-300 mL in a 290 mg/ 5 mL solution. 2.4-4.8 grams of magnesium hydroxide has also been used. 10-30 grams of magnesium sulfate has also been used. Magnesium salts should only be used for occasional treatment of constipation, and doses should be taken with a full 8 oz glass of water.
- For indigestion (dyspepsia): 400-1200 mg of magnesium hydroxide has been used up to four times daily. 800 mg of magnesium oxide daily has also been used.
- For low levels of magnesium in the blood (hypomagnesemia): 3 grams of magnesium sulfate, taken every 6 hours for four doses, has been used. A 5% solution of magnesium chloride has been used by mouth daily for 16 weeks. Magnesium-rich mineral water (Hepar) containing 110 mg/L has also been used. 10.4 mmol of magnesium lactate, taken by mouth daily for 3 months, has been used. Avoid magnesium oxide and magnesium carbonate.
- For irregular heartbeat (arrhythmias): 2.163 mg of magnesium-DL-hydrogen aspartate and 2.162 mg of potassium-DL-hydrogen aspartate given daily for 21 days has been used.
- For heart disease: 800-1200 mg of magnesium oxide taken daily for 3 months has been used.
- For diabetes: For type 2 diabetes, 2.5 grams of magnesium chloride in a 50 mL solution daily for 16 weeks has been used. 300 mL of salt lake water with naturally high magnesium content diluted with distilled water to contain 100 mg of magnesium per 100 mL of water has been used daily for 30 days. 360 mg of magnesium daily for 4 to 16 weeks has been used. For type 1 diabetes, 300 mg of a specific magnesium gluconate supplement (Ultramagnesium) daily for 5 years has been used.
- For fibromyalgia: Magnesium hydroxide plus malic acid (Super Malic tablets) has been used. 300 mg of magnesium citrate daily for 8 weeks has also been used.
- For hearing loss: 167 mg of magnesium aspartate mixed in 200 mL lemonade, taken daily for 8 weeks or as a single dose, has been used.
- For high cholesterol: 1 gram of magnesium oxide daily for 6 weeks has been used.
- For a grouping of symptoms that increase the risk of diabetes, heart disease, and stroke (metabolic syndrome): 365 mg of magnesium aspartate daily for 6 months has been used.
- For a disease of heart valves (mitral valve prolapse): 1200-1800 mg of magnesium carbonate taken daily for 5 weeks has been used.
- For weak and brittle bones (osteoporosis): 300-1800 mg of magnesium hydroxide taken daily for 6 months, followed by 600 mg of magnesium hydroxide taken daily for 18 months, has been used. 1830 mg of magnesium citrate has been used daily for 30 days. In addition to estrogen, 600 mg of magnesium plus 500 mg of calcium and a multivitamin supplement has been used daily for one year.
- For premenstrual syndrome (PMS): 333 mg of magnesium oxide taken daily for two menstrual cycles has been used. A higher dose of 360 mg elemental magnesium three times daily has been used from the 15th day of the menstrual cycle until menstrual period begins. 360 mg of elemental magnesium taken three times daily for 2 months has been used. A combination of 200 mg of magnesium daily plus 50 mg of vitamin B6 daily has been used.
CHILDREN
BY MOUTH:
- General: The daily Recommended Dietary Allowances (RDA) for elemental magnesium are: Age 1-3 years, 80 mg; 4-8 years, 130 mg; 9-13 years, 240 mg; 14-18 years, 410 mg (boys) and 360 mg (girls). For infants less than one year of age, adequate intake (AI) levels are 30 mg from birth to 6 months and 75 mg from 7 to 12 months. The daily upper intake level (UL) for magnesium is 65 mg for children age 1-3 years, and 110 mg for 4-8 years.
- For cystic fibrosis: 300 mg of magnesium-glycine taken daily for 8 weeks has been used. *
