What calories physically are, and how things like water and celery have none whatsoever?
In: Biology
Its the unit of energy like what everyone said.
thye USED to actually put the food in a container with water, BURN the food, then measure the water temp raise. Celery have calories, its just that it takes more energy to chew them then what you gain, hence a negative en intake. Which is kinda misleading to call it 0 cal food.
Our society is terribly misleading on health. Calories are a unit of measurement of energy. We get energy from fats, carbohydrates, and proteins. Calories refers to the amount of energy required to raise 1 gram of water 1 degree Celsius. Water has no carbohydrates, proteins or fats, hence no calories. Celery is composed of a fibre that humans cannot digest, and so it passes through without breaking down in the enzymes our bodies utilize.
It’s a myth that celery has no calories.(it’s still a myth that they take more calories to process than you get out of it)
The “calories” for food are measurement of energy.
In food this energy is stored in the bonds in various kinds of molecules.
In our biology, most of the time the body makes these molecules break apart and bond with oxygen.
This breaking apart and re-bonding releases the energy of the bond to do the things you need to live.
Calorie is a unit of energy equal to the amount of heat needed to raise the temperature of one gram of water by one degree Celsius. Celery has negative calories because your body burns more calories processing the celery than the celery itself contains.
Calories are what components of the food have hat can be processed to get energy (ATP) water isnt a molecule that can be turned to ATP but lipids carbonhydrades and aminoacids can be turned to it. And celery has carbonhydrades so it has calories but not so much as foods with lipids(fats) inside
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