People are powered by the chemical energy in the food they eat.
Dietary CHO and fat are the major nutrients used for fuel.
fats
Blood sugar also known as blood glucose
The preferred fuel source for the body is glucose.
The most major heat source of the body is the blood cells in our body, however it can be our muscles as well.
Coal .
Fat or lipids
Fat or lipid
At rest, the body's fuel source is primarily fat. The body relies on stored fat for energy during periods of inactivity or low-intensity activities. Fat provides a more sustained source of energy compared to carbohydrates.
glucose
Drinking water
Carbohydrates are the most important fuel source in your diet, except when you live on the north pole. In your body, you have fat as a most important fuel source. You have about 300 grams of carbohydrates is stored in your body and ten to twenty kilos of fat is stored there.