Effects of carnosine supplementation to an all-plant protein diet for rainbow trout (Oncorhynchus mykiss)

► Carnosine supplementation does not improve growth performance of trout fed an all-plant-protein diet. ► Cellular muscle development was not enhanced by carnosine supplementation. ► Feeding trout an all-plant-protein diet results in increased muscle protein degradation via calpain induced proteolysis.