D-Threonine, the D-enantiomer of the amino acid threonine, is primarily utilized in biochemical and pharmaceutical research. It acts as a key building block in the synthesis of stereospecific peptides and proteins, facilitating studies on their structure, function, and biological activity. Its unique stereochemistry makes it essential for chiral synthesis, enabling the production of enantiomerically pure compounds for drug development. D-Threonine is also explored in potential therapeutic contexts, including metabolic disorder research and as a precursor in the synthesis of certain antibiotics and antimicrobial agents. Unlike the natural L-Threonine, it is not commonly used in nutritional applications.