Added to Cart
Cart Total:
Customers Also Bought:
24/7 Help

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

$5.24 $5.24 (Saved $1.75)

Thank you!

Your email is being processed.

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

Shipping Saver ?
Our Price:
You Save:
$1.75 (25)
  • Quantity Discount
  • Buy 4+
    Save 5%
  • Buy 12+
    Save 10%

Sorry, this product is no longer in stock.

Earn 5% Loyalty Credit ?

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

In Stock
  • Expiration Date: May 2020
  • Shipping Weight:
    0.3 lbs
    Switch to Metric units
  • Product Code: CEN-27072
  • UPC Code: 740985270721
  • Package Quantity: 90 Tablets
  • Dimensions:
    1.8 x 2.4 x 3.7 in, 0.25 lbs
    Switch to Metric units
Combo Offer!
Save $2.00 when you purchase these items today for only $10.24
Together: $10.24

Sorry, this product is no longer in stock.

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


Posted by danijelasvenda on Aug 28, 2017 | Verified Purchase

Lako ih je progutati. Nema vise umora tako da mislim da djeluju.

Thanks for your feedback!

value for money.

Posted by iHerb Customer on Aug 12, 2017 | Verified Purchase

I have used this product for several years now and find it is a gentle laxative .

Thanks for your feedback!

This product has great features .

Posted by iHerb Customer on Jul 31, 2017 | Verified Purchase

This product has great features, I fill keeping younger 25 years !

Thanks for your feedback!

nearly as good as more expensive forms

Posted by iHerb Customer on Jun 04, 2017 | Verified Purchase

Works almost as well as more expensive formulations for constipation relief.

Thanks for your feedback!


Posted by iHerb Customer on Jun 02, 2017 | Verified Purchase

do the job

Thanks for your feedback!