E216 – Propyl p-hydroxybenzoate | Propylparaben Ban, Hormone Risk & Uses

Quick analysis summary about E216 – Propyl p-hydroxybenzoate food additive

Bottom line about E216

E216 is propyl p-hydroxybenzoate, better known as propylparaben. It is graded RED – UNSAFE for food use because it is no longer authorised in the EU or UK, and safety bodies could not keep a reassuring Acceptable Daily Intake (ADI) after male-rat reproductive findings.[1,2]

Why this grade for E216

The concern is not acute poisoning from a single trace exposure. The problem is that the original food-safety basis became unreliable after a juvenile-rat study reported reduced sperm production within the old paraben group ADI range, while later studies challenged but did not remove the uncertainty.[1-5]

Who may want to limit or avoid E216

People in markets where E216 can still appear in foods should avoid it when possible. Extra caution is reasonable for children, people trying to conceive, pregnant people, and anyone who prefers to avoid endocrine-active preservatives.

Common uses and where E216 appears

Where permitted, propylparaben may be used to slow mould and yeast growth in processed foods, flavouring systems, confectionery, fillings, and baked goods. It is also common in cosmetics and medicines, so label context matters.

E216 source or origin

Commercial E216 is usually synthetic. It is made by esterifying p-hydroxybenzoic acid with propanol, small natural occurrence of related parabens does not make the manufactured additive automatically safer.

Intake note for E216

EFSA could not recommend a specific ADI because it lacked a clear no-effect level for the key reproductive endpoint, and JECFA later withdrew propylparaben from the previous paraben group ADI.[1,2] A practical consumer target is avoidance rather than staying below a numerical limit.

Is E216 banned anywhere?

E216 is not authorised as a food additive in the EU or UK, while the United States still lists propyl p-hydroxybenzoate as a food substance with antimicrobial use under specified regulatory conditions. Canada allows restricted uses after a more recent national assessment, but California has enacted a state-level food ban taking effect in 2027.

Safety grading RED – UNSAFE

E216 receives a RED – UNSAFE grade because the EU/UK food position and JECFA withdrawal point to an unresolved reproductive-safety problem. The grade does not mean that accidental tiny exposure is expected to cause immediate harm. It means this preservative has a poor safety profile for routine food use compared with alternatives, especially because the main concern involves male reproductive endpoints and endocrine activity.[1-5]

Study basis or key toxicological reasoning for E216

The pivotal concern came from a four-week dietary study in juvenile male rats given propylparaben from about three weeks of age. It reported reduced daily sperm production at the lowest tested dose, about 10 mg/kg body weight per day, so no clear NOAEL (No Observed Adverse Effect Level) was identified.[1,2] A later eight-week oral gavage study in juvenile male Wistar rats found no adverse effects on reproductive organ weight, sperm parameters, hormones, or histopathology up to 1000 mg/kg body weight per day.[3] Human oral pharmacokinetic data show rapid absorption and clearance, but they do not resolve the reproductive hazard question.[4] Reviews therefore describe mixed evidence, with the older positive study questioned but still influential in food regulation.[5,6]

Side effects of E216 – Propyl p-hydroxybenzoate food additive

Reproductive-toxicity concern: The main signal is reduced sperm production and hormone-related effects reported in juvenile male rats.[2]
Endocrine activity: Parabens are weakly estrogenic in some experimental systems, and propylparaben is part of that endocrine-active group.[2,6]
Regulatory non-compliance risk: In EU and UK foods, an E216 label would indicate a serious formulation or import problem because the additive is not authorised.
Allergy or irritation: Paraben sensitivity is more often discussed for skin or medicinal exposure, but sensitive individuals may still prefer to avoid propylparaben-containing products.[6]
Frequent exposure uncertainty: Repeated intake is the concern, not a single accidental trace exposure.

Should You Avoid E216 – Propyl p-hydroxybenzoate food additive?

Yes. For food use, E216 is best avoided. It has been removed from EU and UK food additive authorisation, JECFA withdrew it from the previous paraben group ADI, and safer alternative preservatives are available. In the United States and some other markets, propylparaben may still be legally used under restrictions, but legality does not remove the unresolved reproductive and endocrine concerns. Consumers who want a conservative approach should choose foods without propylparaben, especially for children or regular household use.

Common uses of E216 – Propyl p-hydroxybenzoate food additive

Legacy preservative in some processed foods where it was used to inhibit moulds and yeasts.
Confectionery, coatings, fillings, or sweet preparations in markets where paraben preservatives are still permitted.
Packaged baked goods or tortillas in some non-EU markets because parabens can work in low-acid foods.
Flavouring systems or adjuvant uses where antimicrobial stability is needed.

Common names and synonyms of E216 – Propyl p-hydroxybenzoate food additive

Propyl p-hydroxybenzoate
Propylparaben
Propyl paraben
Propyl 4-hydroxybenzoate
p-Hydroxybenzoic acid propyl ester
Propyl parahydroxybenzoate
Nipasol
INS 216

What is E216 – Propyl p-hydroxybenzoate food additive?

E216 is an ester of p-hydroxybenzoic acid and propanol. It belongs to the paraben family, a group of preservatives that inhibit yeasts, moulds, and some bacteria at low concentrations. Its propyl chain makes it more lipophilic than methylparaben or ethylparaben, which can influence antimicrobial performance and biological activity.

In food technology, propylparaben was valued where microbial spoilage is a problem and other preservatives may be less effective. Its controversy is not mainly immediate toxicity, because reviews describe low acute toxicity and rapid metabolism.[6] The problem is the weight given to endocrine and male reproductive endpoints in young animals, plus the absence of a food-use ADI accepted by EFSA and JECFA.

Where is E216 – Propyl p-hydroxybenzoate food additive allowed (EU vs US)?

E216 is not authorised for food additive use in the European Union or the United Kingdom. In the United States, FDA listings still include propyl p-hydroxybenzoate as a food substance used as an antimicrobial agent under good manufacturing practice, but California has enacted a separate state ban that is scheduled to apply from January 2027. Canada permits more limited uses after a national reassessment.

E216 – Propyl p-hydroxybenzoate