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E523Anti-caking agentModerate concern
Aluminium Potassium Sulfate
In plain words
The short version
Potash alum — the classical pickle-firmer and double-acting-baking-powder acid, now restricted in EU.
Why we flag it amber
It's permitted and generally considered safe, but there are a few reasons to be mindful — like sensitivities in some people, debated studies, or intake limits. The Safety section below explains the specifics.
Safety profile
ADI of 0–1 mg/kg body weight (combined aluminium). Soluble aluminium forms (like alum) contribute more to absorbed aluminium than metallic or insoluble forms — same EFSA concern that lowered the ADI.
The detail
Educational information only. Not medical or dietary advice.