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Ingredient · Vitamin Mineral

Magnesium Oxide

Cleaner · 7/10, higher is cleaner

How we reached this

Magnesium oxide — magnesium-fortification compound. NIH ODS RDA 310-420 mg/day adults. Bioavailability lower than magnesium citrate/glycinate. Permitted FDA fortification.

Sources · 1

Products containing this · 3

About this rating

Ratings run 1–10, higher is cleaner, and are set editorially against the sources above — see the methodology page for how an ingredient rating becomes part of a product score. Last reviewed 2026-05-25.