Power Foods: Do They Work?

Americans are eating--and drinking--some pretty strange stuff these days. Too harried for sit-down meals or pressed to shed pounds or just carried away with the idea of a healthy snack, they're gobbling up by the millions what was once an esoteric favorite of long- distance bicycle racers, marathoners and mountain climbers: so-called energy, protein or diet bars. Even more surprising is their infatuation with flavored concoctions known variously as designer, health or fitness waters. Imaginatively bottled and labeled (Smartwater, Lizard Lightning, Magic Recovery) and laced with every sort of nutritional supplement imaginable, they're fast crowding such standbys as Perrier and Poland...

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