Magnesium Oxide Supplement


Magnesium Oxide supplement from Cooper Complete helps support:

  • Bone health
  • Energy production
  • Heart health
  • Sleep health
  • 1 capsule per serving. 100 capsules per bottle.

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Product Details

Product Description

Magnesium Oxide is involved in more than 600 biochemical reactions in the human body. Every cell in your body contains it and needs it to function.

Bone Health:

  • Magnesium Oxide works with vitamin D and calcium to create a strong structure for bones
  • Calcium levels in the bones are regulated by magnesium

Energy Production:

  • Magnesium Oxide helps convert food, especially carbs, into energy for the body
  • Low magnesium levels lead to insulin resistance which leads to fatigue

Heart Health:

  • American Heart Association found an association between low magnesium levels and increased rates of mortality
  • Magnesium Oxide helps protect blood vessels by helping them relax and pump at a lower pressure

Sleep Health

  • Magnesium Oxide helps regulate the hormone melatonin to promote healthy sleep cycles
  • Healthy magnesium levels help stimulate calming signals in the nervous system

Cooper Complete products are verified and lot tested. If you would like a copy of a Certificate of Authenticity for a specific product or would like to learn more about our testing process and results, please contact us at  or call our team directly at 888.393.2221 9 a.m. until 5 p.m. Monday-Friday central time (CST).

Supplement Facts
Serving Size: 1 capsule
Servings Per Container: 100
Ingredients Daily
% Daily
Magnesium (from 500 mg Magnesium Oxide) 300 mg 75%

Other ingredients: Hydroxypropyl methylcellulose (capsule), microcrystalline cellulose, carnauba wax, ascorbyl palmitate, hydroxypropyl cellulose and silica.

Gluten-Free, Non-GMO

Item Number: 166
SKU: 816899000614
Formula Number: 202434-100-PL-84121312
Product of USA


Frequently Asked Questions

What is Magnesium Oxide?

Magnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. It is the oxide salt of magnesium. In addition to its benefits for bone health, energy production and heart health, it is also often used as an antacid and mild laxative and has many nonmedicinal uses.

Should I take calcium with magnesium?

Calcium and magnesium have a complicated relationship. Magnesium is essential for the absorption and metabolism of calcium inside the body. It’s important to keep these two minerals in balance. Too much calcium and/or too little magnesium can have negative health effects. It is important to speak with your physician before taking supplements to understand your specific needs.

How much magnesium should I take per day?

The National Institutes of Health recommends for adults 19+ 300 mg to 420 mg of magnesium daily. It is important to speak with your physician before taking supplements to understand your specific needs.

What foods contain high levels of magnesium?

Common foods that are high in magnesium include fatty fish, whole grains, avocados, bananas, nuts and leafy greens.

What are signs of magnesium deficiency?

Symptoms of magnesium deficiency can include nausea, vomiting, loss of appetite, fatigue and weakness. As magnesium deficiency worsens, numbness, tingling, muscle contractions and cramps, seizures and abnormal heart rhythms can occur.

Who is at risk of magnesium deficiency?

The National Institutes Health lists older adults and people with gastrointestinal diseases, type 2 diabetes and alcohol dependence as the top groups at risk of magnesium deficiency.

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