Used as a stable isotope-labeled internal standard in mass spectrometry and metabolic studies to trace fatty acid metabolism. Its deuterated form allows precise quantification and differentiation from endogenous myristic acid in biological samples. Commonly applied in lipidomics research, pharmacokinetic studies, and biomarker discovery where accurate measurement of fatty acid levels is critical. Also employed in studying protein acylation processes, including N-myristoylation, due to its structural similarity to natural myristic acid while being metabolically stable.