Z-D-Abu-OH is primarily used in peptide synthesis as a building block for creating specific peptide sequences. Its unique structure allows for the introduction of non-natural amino acids into peptides, which can enhance stability, modify biological activity, or improve resistance to enzymatic degradation. This compound is particularly valuable in the development of peptide-based drugs, where precise control over peptide structure is crucial for achieving desired therapeutic effects. Additionally, it finds applications in research settings for studying peptide interactions, folding, and function, aiding in the exploration of new bioactive compounds and potential drug candidates.