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E234PreservativeLow concern
Nisin
In plain words
The short version
A natural antimicrobial peptide from cheese bacteria — preserves processed cheese and canned foods.
Why it's green
It's widely considered safe at the amounts used in food, so we mark it green. The Safety section below has the details.
Safety profile
ADI 0.13 mg/kg body weight (EFSA/JECFA). Being a peptide, it is digested like any dietary protein. Long history of safe use with no significant concerns at permitted levels.
The detail
Educational information only. Not medical or dietary advice.