Magnesium Oxide

About

About Magnesium Oxide Magnesium oxide is an inorganic salt consisting of magnesium and oxygen. It is the most common form of magnesium found in pharmacies and grocery stores, primarily because it is inexpensive to manufacture and has a very high concentration of elemental magnesium—often around 60%. This means the pills can be much smaller than other forms while still claiming a high milligram count on the label. However, the major trade-off with magnesium oxide is its poor bioavailability. Because the bond between the magnesium and oxygen is very strong, your body has difficulty breaking it apart to absorb the mineral. Studies suggest that only about 4% to 10% of the magnesium in an oxide supplement is actually absorbed into the bloodstream. The rest remains in the digestive tract, where it acts as an osmotic laxative by drawing water into the intestines. More About Magnesium Oxide Benefits of Magnesium Oxide While magnesium oxide has low systemic absorption, its primary benefits lie in its high concentration of elemental magnesium and its specific utility for digestive and acute health issues. Because it is a dense, compact molecule, it allows for smaller, more convenient tablets that are highly effective as an antacid for neutralizing stomach acid and relieving heartburn. Its most significant benefit is its role as a potent osmotic laxative, drawing water into the intestines to provide reliable relief for occasional constipation. Additionally, due to its affordability and high milligram count, it is frequently used in clinical settings for migraine prevention, provided the user can tolerate its effect on the digestive tract. Frequently Asked Questions Why is the milligram count so high if it isn't absorbed well? Manufacturers love magnesium oxide because it is physically dense. A tiny pill can hold 500 mg of magnesium oxide, whereas a giant magnesium glycinate capsule might only hold 100 mg. However, since your body only absorbs about 4% to 10% of it, that "500 m