On leaving the Navy, Shulgin returned to Berkeley, where he earned a Ph.D. in biochemistry.
biochemistry bi·o·chem·is·try (bī'ō-kěm'ĭ-strē)
The study of the chemical substances and vital processes occurring in living organisms.
The chemical composition of a particular living system or biological substance.
The study of the structure and interactions of the complex organic molecules found in living systems.