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Magnesium Stearate

Excipient (pharmacologically inactive substance)

What is Magnesium Stearate?

Magnesium stearate (Mg(C18H3502)2 or octadecanoic acid) is a solid, white powder at room temperature. It is a FDA-approved inactive ingredient commonly used in the pharmaceutical industry as a diluent for the manufacture of tablet, capsule, and powder dosage forms. Magnesium stearate is generally recognized as safe by the FDA.[1] Magnesium stearate exists as a salt form and is useful for it's lubricating properties for capsules and tablets in industry. It is used to help prevent pharmaceutical ingredients from adhering to industry equipment.[2] Magnesium stearate may be derived from both plant and animal sources.