In Carotene: In this undated photo released by the International Center for Tropical Agriculture (IITA), scientists check at cassava plantations for signs of pests and diseases at a field in Nakhon Ratchasima province northeastern Thailand. Scientists are planning to release 250,000 wasps in the northeast region of Thailand on Saturday, July 17, 2010, in a bid to halt a mealy bug infestation that threatens to destroy its lucrative cassava crop. (AP Photo/Neil Palmer, IITA)

Exercise and a well-balanced diet far outweigh any health advantage from vitamin supplements. Writing in the November issue of the Harvard University Men's Health Watch, Harvard Professor Harvey Simon argues against taking pills or powders to promote better health. "There have been careful studies done of many of these supplements, particularly of the antioxidant vitamins and B vitamins which have ...Carotene