By Lesley Rotchford
"I'm a very healthy eater," says Emily, a 30-year-old, stick-thin investment banker. "My diet consists of fruits, vegetables, fish, whole grains, Tasti D-Lite frozen dessert, Diet Coke, lollipops, sugar-free gum, and 100-calorie packs. Thank God for the 100-calorie packs. They've changed my life."
Emily is a card-carrying — make that banner-waving — member of the newest group of calorie counters: junk-food dieters. According to their credo, low-calorie is good; no-calorie is better — even if the food contains more chemicals than a can of hair spray.