L-Tyrosine can be synthesised within the physique from L-phenylalanine, a necessary amino acid. The additive L-tyrosine is produced by acid hydrolysis of feather keratin. L-Tyrosine is considered protected for all animal species, supplied that the circumstances of use are respected, i.e. supplementation of standard diets with 0.5 % L-tyrosine for…[Read more]