I need to know what is the standard way of measuring the energy value of food that we consume.
Please have a look at this link.
http://www.biologydiscussion.com/biochemistry/energy-value/measurement-of-energy-value-of-foods-biochemistry/44011
Please check the following link also.
https://www.researchgate.net/publication/280383247_Determination_of_the_Energy_Value_of_Beer
Article Determination of the Energy Value of Beer
Dear colleague
Take samples of a range of foodstuffs and set them alight in turn. Burn food samples under a boiling tube containing a measured amount of water. Measure the temperature increase in the water. Calculate the amount of energy needed to cause that temperature increase. This gives an estimate of the amount of energy stored in the food.
Regards
The direct method is called bomb calorimetry using an apparatus called bomb calorimeter which measures the temperature increase due to the heat released by burning food material. An indirect method is calculating food caloric value after analysis of major food components and assign a caloric value for each like 10 kcal/g for fats, 9 for proteins and 4 for carbohydrates.
Regards
SM Najim
The net available energy for foods is 9 kcal/gm for fats and 4 kcal/gm for both carbohydrates and proteins. This net available energy accounts for the energy cost of digestion, and, in the case of proteins, also for the energy lost via nitrogenous waste products.
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