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21st Century, MgO, Magnesium Oxide, 400 mg, 90 Tablets

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In Stock
  • Expiration Date: Nov 2019
  • Shipping Weight: 0.3 lbs (0.14 kg)
  • Product Code: CEN-27072
  • UPC Code: 740985270721
  • Package Quantity: 90 Tablets
  • Dimensions: 1.8 x 2.4 x 3.7 in, 0.25 lbs (0.11 kg)
Product Overview


  • Dietary Supplement
  • Pharmaceutical Grade
  • Compare Active Ingredient To Blaine MagOx 400®†
  • 21st Century...For a Healthier Future

MgO 400 mg (Magnesium Oxide)

Necessary for the metabolism of calcium, vitamin C, phosphorus, sodium, and potassium. Magnesium is essential for nerve and muscle function , and for converting blood sugar to energy. Ninety percent of Americans don't get enough magnesium in their diets. Certain prescription drugs such as loop and thiazide diuretics, cisplatin, cyclosporine and antibiotics may deplete magnesium.

Suggested Use

Take one (1) tablet twice daily with any meal for maximum daily results, or as directed by your healthcare provider. Do not exceed recommended dosage.

Other Ingredients

Calcium carbonate, cellulose, stearic acid, kelp, croscarmellose sodium, silicon dioxide, magnesium stearate.

Unconditionally guaranteed for purity, freshness and label potency. No added sugar, salt, yeast, preservatives, artificial flavor or colors.

†Blaine MagOx 400® is a registered trademark of Blaine Pharmaceuticals, Burlington, KY 41005


Keep out of reach of children. Do not use if product appears to be tampered with or seal is broken. Store at room temperature.

Supplement Facts
Serving Size: 1 Tablet
Serving Per Container: 90
  Amount per Serving % DV
Magnesium (as Magnesium Oxide 400 mg USP) 241.3 mg 60%
Percent Daily Value (DV).
iHerb Customer Reviews

Works wel for the price

Posted by 4693702832265557226 on Dec 04, 2016

Not all manufacturers are the same this one is ok for the price, better than others, without paying twice as much im pleased, the way more costly ones works a little better, but not enough better for me to pay twice as much..

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Posted by 5193282268225987233 on Dec 04, 2016

So far ok

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Posted by 5354320629350623457 on Jun 21, 2016


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Great Product

Posted by funkydharma on Jun 11, 2016

Is gentle on the stomache, a reasonable price and it actually works. I can tell because it improves my asthma.

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Posted by 5489643826506194534 on Apr 14, 2015

Very good product.

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