---
title: "Commission Implementing Regulation (EU) 2017/873 of 22 May 2017 concerning the authorisation of L-tryptophan produced by Escherichia coli as a feed additive for all animal species (Text with EEA relevance. )"
id: fde4163f-c34f-47c0-b915-a2ad4aeefa60
authority: eu
place: "European Union"
applies_also_from: []
kind: regulation
in_force: true
publisher_url: https://eur-lex.europa.eu/legal-content/EN/ALL/?uri=CELEX:32017R0873
attribution: "© European Union, https://eur-lex.europa.eu"
solon_url: https://solon.orangecat.ch/law/fde4163f-c34f-47c0-b915-a2ad4aeefa60
text: not held
---

# Commission Implementing Regulation (EU) 2017/873 of 22 May 2017 concerning the authorisation of L-tryptophan produced by Escherichia coli as a feed additive for all animal species (Text with EEA relevance. )