If a banana is said to have 100kcal and you and I eat it are we going to get:
1. all of those calories?
2. the same amount of energy or it varies person to person?
In: Biology
Think of calories as food energy money. A banana is worth 100kcal, but that money comes from different sources – sugar, fat, protein. And the body spends it all differently.
If you get 100kcal, you dont just store it in your bank as fat. Some goes to pay energy bills, some goes to build muscle, a little may go to fat storage. Some may go to feeding but bacteria.
Calories indicate how much energy is in a food. But only a small amount of that energy will go to storage, and usually only when you’ve already eaten too much and haven’t spent it with exercise.
Calories aren’t actual energy tho – like money they mean nothing without the goods you want to buy. Calories represent the energy released when breaking down a unit of a macronutrient, like a carb. 1 gram of carbs costs or yields 4 calories. That means when you eat a gram of sugar, the body breaks down the chemical bonds and releases 4 calories of heat.
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