{"id":289,"date":"2021-07-05T06:45:28","date_gmt":"2021-07-04T20:15:28","guid":{"rendered":"https:\/\/xalient.in\/2d\/?p=289"},"modified":"2021-07-05T07:38:56","modified_gmt":"2021-07-04T21:08:56","slug":"how-are-calories-in-food-calculated","status":"publish","type":"post","link":"https:\/\/2dpoint.net\/how-are-calories-in-food-calculated\/","title":{"rendered":"How are calories in food calculated?"},"content":{"rendered":"Reading Time: <\/span> 2<\/span> minutes<\/span><\/span>

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1. Like kilometre is the measure of distance, a calorie is the measure of energy.<\/span><\/li>\n
2. One food calorie (1Kcal) is the energy that will raise the temperature of 1 litre of water by 1 degree C.<\/span><\/li>\n
3. The old method of calorie counting was simple and was called the bomb calorimeter<\/a> method.<\/span><\/li>\n
4. Food (after removing its moisture) was kept inside a chamber that was surrounded by an insulated jar filled with a measured amount of water.<\/span><\/li>\n
5. Any air from the chamber will be sucked out and pure oxygen would be added; then a fuse would ignite the food sample causing it to burn.<\/span><\/li>\n
6. The resulting change in the water temperature multiplied by the amount of water gave the calorie count.<\/span><\/li>\n
7. For example, if you burnt 100g of Pringles potato chips, surrounded by 2 litres of water, and the water temperature increased by 30 degrees C, you could say 100g of Pringles chips have 60KCal (2 Litres X 30 degrees C).<\/span><\/li>\n
8. This method, however, had a flaw.<\/span><\/li>\n
9. Food usually contains fibre that would burn in the calorimeter, but in reality, it is not absorbed into the bloodstream and is thrown out of our body into the toilet.<\/span><\/li>\n
10. This system, therefore, was modified using the current Atwater System.<\/span><\/li>\n
11. Dr. Atwater, in the 1800s, took a group of people and monitored the core content of their diets.<\/span><\/li>\n
12. He also took the core content of their poop<\/a> & urine (gases were ignored) and subtracted energy lost in them from energy obtained from the diet (as measured using Bomb Calorimeter Method).<\/span><\/li>\n
13. Based on multiple readings, he concluded it as a 4-9-4-7 method, i.e., proteins produce 4Kcal\/gram, fats<\/a> produce 9 Kcal\/gram, carbohydrates produce 4Kcal\/gram, and alcohol produces 7Kcal\/gram.<\/span><\/li>\n
14. Using the 4-9-4-7 method, you can also calculate calories in your diet.<\/span><\/li>\n
15. This model, too, is far from perfect because two foods with the same number of calories on the label can have a different number of calories in reality as absorption of food can vary with each person and the type of food.<\/span><\/li>\n
16. These deviations, however, have been considered insignificant, but the search for a better system is still on.<\/span><\/li>\n<\/ol>\n
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