Magnesium
(Oxide)
Magnesium oxide is a supplement used primarily for correcting magnesium deficiency and relieving constipation, but has low oral bioavailability compared to other forms.
Magnesium oxide (MgO) is an inorganic compound that acts as a magnesium supplement and antacid. It is commonly used to address magnesium deficiencies and to treat constipation through its osmotic laxative effect. However, its low solubility means lower absorption versus other magnesium salts.
Magnesium's benefits for correcting deficiency and reducing constipation are well-established, but evidence for effects on other conditions (e.g., migraines) is less robust. Magnesium oxide is less bioavailable than other forms.
Corrects magnesium deficiency
StrongUsed to restore normal magnesium levels, supporting muscle, nerve, and heart health.
Relieves constipation
StrongActs as an osmotic laxative by drawing water into the intestines, promoting bowel movements.
May support migraine management
LimitedSome evidence suggests magnesium supplementation may reduce migraine frequency or severity, though magnesium oxide is not the most studied form for this use.
Antacid for occasional heartburn
LimitedWorks as an antacid to neutralize stomach acid and relieve occasional heartburn or indigestion.
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