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Potassium Magnesium Chloride

Also known as: carnallite-type salt, K-Mg chloride

Low concern

Recognized as safe at typical food-use levels. People with kidney disease, those on potassium-sparing diuretics, or with adrenal insufficiency should be cautious because excess potassium can cause hyperkalemia.

What it is

A mineral salt containing potassium, magnesium, and chloride ions, typically used as a low-sodium salt substitute or mineral fortifier.

Provides salty taste while reducing sodium, and supplies potassium and magnesium.

Why it's flagged

Excess potassium risk for people with impaired kidney function

Regulatory status

United States — FDA

Component salts GRAS (21 CFR 184)

European Union — EFSA

Permitted as mineral source / food additive

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