Evaluation of new dietary histidine products

Offentlig prosjektsammendrag

In this project we will examinate the efficacy of new synthetic sources of L-Histidine (His) monohydrochloride monohydrate to support tissue His status and cataract mitigation in Atlantic salmon smolt after sea transfer by using up-to-date industrial diets. Cataracts are a typical example of a production-related order, i.e., non-infective and surplus of dietary His higher than the requirement for growth mitigate cataract development. For example, plant ingredients tend to have insufficient essential amino acids such as His to cover the dietary levels needed to mitigate the production-related disorder cataract, and His as a functional additive mitigates the problem, although at an high economical cost. Until recently only one supplier of the synthetic histidine have been present in the market as the only company allow to delivered according to the European union EFSA legislations. Currently there are two new suppliers which recently got the EFSA approval for L-Histidine monohydrochloride monohydrate for salmonids. If the new His suppliers are proved to have higher efficacy then we can make feed which is having an improved mitigation effects on the production disorder cataract. This means potentially improved fish health welfare.