In 1967, George Wald was awarded the Nobel Prize (along with Ragnar Granit and Haldan Keffer Hartline) for his discovery that vitamin A could participate directly in a physiological process.
I 1967 blev George Wald tildelt nobelprisen (sammen med Ragnar Granit og Haldan Keffer Hartline) for opdagelsen af at vitamin A kan deltage direkte i en fysiologisk proces.