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Safety of l-tryptophan technically pure, produced by Escherichia coli CGMCC 3667, for all animal species based on a dossier submitted by GBT Europe GmbH

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Published on: Mon, 06 Mar 2017 +0100

l-Tryptophan, technically pure, is a feed additive produced by fermentation with a genetically modified strain of Escherichia coli. The Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) of EFSA, issued two opinions on the safety and efficacy of the product, in which it could not conclude on the safety of this additive for target animals, consumer, user and the environment, due to the insufficient characterisation of the genetic modification. The European Commission asked the Authority to deliver an opinion on the safety of l-tryptophan, technically pure, as a nutritional additive for all animal species based on additional data submitted by the applicant. Based on new information provided on the genetic modification, including the presence/absence of antibiotic resistance genes in the production strain, the FEEDAP Panel concludes that the l-tryptophan is safe for target animals, consumers, users and the environment.

© European Food Safety Authority, 2015

Safety of l-tryptophan technically pure, produced by Escherichia coli CGMCC 3667, for all animal species based on a dossier submitted by GBT Europe GmbH


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