How is the composition (in fats, proteins or carbohydrates) of a certain food estimated and how is the amount of calories provided by the food calculated?
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1$\begingroup$ scientificamerican.com/article/how-do-food-manufacturers $\endgroup$– DubukayCommented Nov 26, 2018 at 15:57
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1$\begingroup$ carolina.com/teacher-resources/Interactive/food-calorimetry+/… $\endgroup$– DubukayCommented Nov 26, 2018 at 15:58
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$\begingroup$ Hi! Welcome to StackExchange. Question is nice but would be better if you add some research you've done $\endgroup$– aaaaa says reinstate MonicaCommented Nov 26, 2018 at 21:37
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Messured by the amount of energy it will take to raise 1 degree celsius in 1 kg of water. You really can never go by what the packaging says either. All depending on how food is prepared, even your digestion differs the count person to person.