David Lester

David Lester was an American biomedical scientist and biochemist who, together with Bernard Brodie, Julius Axelrod and Leon Greenberg, carried out the mid-20th-century research that identified acetaminophen (paracetamol/Tylenol) as the active metabolite of earlier analgesics, helping establish one of the world's most widely used pain relievers. He is documented as a Jewish biomedical scientist. Precise biographical dates are not established in accessible sources.