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Posts: 148 10/5/07 1:00 P
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
Posts: 4,596 10/5/07 12:46 P
How do they figure out calories on a package of food?
Edited by: HSAGE1212 at: 10/5/2007 (12:47)
current weight: 178.0
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