A simple explanation of calories

So that the definition is clear

calories = energy


It is often denoted by the unit Kilocalorie (Kcal).

In some regions, the kilojoule (Kj) unit is used.

Where the 1 of the (Kcal) = 4.184 of the (Kj)


Both are units that measure the amount of energy in food


To make it more clear, food sources of energy are divided into 3 types, known as 



And each of them contains an amount of energy that the human body needs


To carry out his vital activities such as:

Brain              Heart            Kidneys




Or physical activities such as:

Walk                 Work             Training






 Each 1 gram of protein contains 4 calories 

As protein helps in the growth, strengthening, and maintenance of muscles


His best sources:

Meat                     Seeds                 Legumes




In health, protein must be taken from all these different sources and not from just one source


 1 gram of carbohydrates contains 4 calories 

It consists of two parts


It is fast-acting (absorption) and can be obtained from several natural and


Manufactured sources such as:

Fruits                 Sweets        Sugary Drinks 




It consists of two parts

1- Medium effect (Absorption) and can be obtained from:
Rice                      Bread                 Macaroni



2- Slow-acting (Absorption) and can be obtained from:
Beans                   Lentils              Pumpkin



And they may be the best option, as they keep you full for longer. 



 Each 1 gram of fat contains 9 calories 

Most people think that fats are bad and should not be obtained in abundance; But in fact, this is not true, there are healthy and unhealthy fats. Healthy fats are necessary because the body needs them for vital processes. Unhealthy fats are the ones that cause health problems, and impede the necessary vital processes in the body.


Among the good fats are healthy for:

Hair                        Skin                   Nails




The best natural sources of fat are from:

Nuts             Fish             Olive Oil             Eggs




This was a short and simplified explanation of calories. We hope you liked it.

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  • Comment Author



    nice !

    • Comment Author



      شرح بسيط وسهل الفهم شكرا لك

      • Comment Author



        معلومة الدهون اول مره اعرف عنها !!

        • Comment Author




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