E-Numbers to Avoid in Pregnancy — A Practical Watchlist

No authorised E-number carries an official 'avoid in pregnancy' instruction in normal foods — but these are the additive groups most worth moderating while pregnant, and why.

Benzoates (E210–E213) and sulphites (E220–E228) are declared allergens that can trigger asthma and sensitivity reactions — pregnancy doesn't increase that risk, but reactions are more disruptive when pregnant. Nitrites and nitrates (E249–E252) mark out cured and processed meats, a category the NHS already advises caution with in pregnancy. Aspartame (E951) is confirmed safe at normal intakes by EFSA and the NHS, with one absolute exception: women with PKU. And as a general rule, a diet low in ultra-processed food is automatically low in all of these.

For the fuller picture — including why the official position is more reassuring than the headlines — see our companion guide, E-numbers and pregnancy: what's safe.

This page is general information, not medical advice — discuss your diet with your midwife or GP.

The pregnancy watchlist

Additive data sourced from Open Food Facts (ODbL licence) and the European Food Safety Authority (EFSA). This page is for general information and does not provide medical or dietary advice.