Jillian Michaels became a household name as a trainer on NBC's The Biggest Loser and built a fitness, nutrition and media business.
King Gillette took his friend William Painter's advice to invent something disposable and created the thin, inexpensive stamped-steel razor blade that founded Gillette.
William Colgate apprenticed with a New York soap-boiler, then in 1806 set up a starch, soap and candle business on Dutch Street that became Colgate-Palmolive.
George Eastman patented a roll film camera that made amateur photography accessible to the public, founded Kodak and gave heavily to Rochester, MIT and Tuskegee.
Jessica Alba went from Hollywood lead roles in Dark Angel and Fantastic Four to co-founding The Honest Company in 2011, a Los Angeles consumer-goods brand focused on baby and household products.
