David Kritchevsky (January 25, 1920 – November 20, 2006, Bryn Mawr, Pennsylvania) was an American biochemist and expert in lipid nutrition and cholesterol in particular. Kritchevsky was born in Kharkiv (then part of Ukrainian People's Republic) to a Jewish family. He was brought to the United States in 1923 and graduated from the University of Chicago in 1939. He has been cited as "one of the most influential researchers on diet and health of the 20th century". Source: Wikipedia (en)