Ammonium Sulfate (E 517)

Last reviewed October 19, 2026

In plain words: Ammonium sulfate (E 517) is used in small amounts as a yeast food and dough helper in bread.

What the evidence review says

Ammonium sulfate is used in small amounts as a yeast food and dough helper in bread. We found no notable concern for it at normal food uses.

no notable concern

• Source: EFSA Panel on Food Additives and Flavourings (FAF), EFSA J, 2019 · doi:10.2903/j.efsa.2019.5868

For information only, not medical advice. Studies and agency opinions are credited to the authors and agencies who published them; they aren't affiliated with and don't endorse Let Me Scan That or any product. Report an error

This page is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 19, 2026.