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IVOCADO's Photo IVOCADO Posts: 148
10/5/07 1:00 P

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They determine the food's ratio of protein, carbs, and fat per weight and then just multiply (protein and carbs have 4 calories per gram, fat has 9).

But apparently, before they figured that out, they would actually burn the food and measure the heat output. After all, a calorie is nothing but a measure of heat energy.
http://www.straightdope.com/classics/a3_
097a.html

HSAGE1212's Photo HSAGE1212 Posts: 4,601
10/5/07 12:46 P

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How do they figure out calories on a package of food?

Edited by: HSAGE1212 at: 10/5/2007 (12:47)
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