Best Magnesium Supplements in 2026

Magnesium is one of the most important minerals in the human body, involved in over 300 enzymatic reactions. Yet studies suggest that up to 50% of Americans don't get enough. Supplementation can help — but the form you choose matters enormously.

Glycinate vs. Citrate vs. Oxide: What's the Difference?

Magnesium Glycinate is bound to the amino acid glycine, making it highly bioavailable and gentle on the stomach. It's the gold standard for sleep and relaxation. Magnesium Citrate is well-absorbed and has a mild laxative effect, making it great for those with digestive sluggishness. Magnesium Oxide contains more elemental magnesium per pill but has poor absorption — mostly useful as an affordable antacid.

What to Look For

Third-party testing (NSF, USP, or Informed Sport certification) ensures purity and accurate dosing. Look for chelated forms (glycinate, taurinate, threonate) for best absorption. Avoid magnesium oxide unless cost is your primary concern.

Our Top Picks

After testing dozens of products, we've narrowed it down to the best options across different budgets and needs. See the comparison table below for a side-by-side breakdown.