catabolic foods

Question
The theory of catabolic food (as I understand it) it that the digestive process burns more calories than the food supplies, thus creating a negative calorie intake. First, is this true or just another hoax/fad? And second, if true, it would seem to suggest that by only eating catabolic foods, you would gradually waste away and die of starvation! Huh?

Answer
David,
Actually, there aren't any foods with negative calorie balance. There are definitely foods that require more calories to digest than others, though-mostly high fiber veggies, eaten raw. Think celery, radishes, cabbage. You can find more exhaustive lists floating around the Internet. Remember, only raw will do. Ice water technically does have negative calorie balance, because your body has to heat itself back up, but most people warm their bodies by putting on a sweater or changing the thermostat.
Melissa

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