Threonine solution is widely used in the biotechnology and pharmaceutical industries as a critical component in cell culture media. It serves as an essential amino acid, supporting protein synthesis and promoting cell growth, particularly in the production of monoclonal antibodies and recombinant proteins. In animal nutrition, it is added to feed formulations to enhance growth performance, improve immune function, and optimize amino acid balance in livestock and poultry. Additionally, it plays a role in medical applications, such as intravenous nutrition for patients unable to consume protein through normal dietary means. Its use in research laboratories also extends to studying metabolic pathways and amino acid metabolism.