Herman Tarnower (March 18, 1910 – March 10, 1980) was an American cardiologist and co-author (with Samm Sinclair Baker) of the bestselling diet book The Complete Scarsdale Medical Diet (1978), which promoted a high-protein low-carbohydrate fad diet known as the Scarsdale diet. On March 10, 1980, just eight days before his 70th birthday, Tarnower was shot dead by Jean Harris. Harris was convicted of his murder at trial in White Plains, New York, in 1981.