(S)-3-Amino-2-phenylpropanoic acid is primarily used in the pharmaceutical industry as a chiral building block for the synthesis of various bioactive compounds. It serves as a key intermediate in the production of drugs targeting neurological and cardiovascular disorders. Its enantiomeric purity is crucial for the development of medications with specific therapeutic effects, as it influences the drug's interaction with biological targets. Additionally, it is utilized in research for studying enzyme mechanisms and receptor binding, contributing to the advancement of medicinal chemistry and drug design.