Guanidine acetic acid,a new nutritive feed additive,has certain effects on improving the production performance of broiler chickens and pigs,promoting energy metabolism,accelerating protein deposition,improving antioxidant capacity,and improving meat quality. This article reviews the metabolic pathways,physiological effects and mechanisms of guanidine acetic acid,as well as the latest advances in the production performance and meat quality of broiler chickens and pigs,with a view to providing references for th...