Adolf Loewy (German spelling: Adolf Löwy; June 29, 1862 – December 26, 1937) was a German physiologist. A native of Berlin, Loewy studied medicine at the University of Berlin as a student of Emil du Bois-Reymond and Hugo Kronecker, obtaining his medical doctorate in 1885. Later on, he was an assistant to physiologist Nathan Zuntz (1847-1920) in Berlin (Landwirtschaftliche Hochschule). In 1900 he became an assistant professor, and in 1921 was a professor and in charge of the Schweizerisches Institut für Hochgebirgsphysiologie und Tuberkuloseforschung (Swiss Institute for Altitude Physiology and Tuberculosis) at Davos.