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Magnesium Hydroxide

Also known as: E528

Low concern

Magnesium hydroxide (E528) is GRAS under 21 CFR 184.1428. EFSA re-evaluated magnesium salts and found no safety concerns at reported food use levels.

Found in

188 products

E-number

E528

What it is

Magnesium hydroxide, an inorganic compound (Mg(OH)2) used as a food additive.

Acidity regulator / color stabilizer / anticaking.

Why it's flagged

laxative effect at high doses

What regulators actually say

"Magnesium hydroxide... is used as a food ingredient... GRAS when used in accordance with good manufacturing practice."

21 CFR 184.1428 — ecfr.gov

"Magnesium is an essential nutrient... and is also used in some over-the-counter laxatives and antacids."

NIH ODS Magnesium Fact Sheet — ods.od.nih.gov

Regulatory status

United States — FDA

GRAS under 21 CFR 184.1428

European Union — EFSA

Authorized food additive E528

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