But it?s far more complicated than that. Carbohydrates, proteins, and fats, each get converted to energy but each take a different path. Before I start on how fat is burned (or broken down), let me first explain a few key terms in the process of converting food to energy:
ATP: Adenosine Tri-Phosphate is energy. It?s what the body uses as fuel at the cellular level. It can be produced using oxygen (aerobic), or without the presence of oxygen (anaerobic).
Glycolysis: An anaerobic process where glucose is converted to pyruvic acid.
Pyruvic Acid: If oxygen is available it is converted into acetyl CoA. If no oxygen is available it is converted into lactic acid.
Acetyl CoA: All this potential energy can only be achieved if it enters the Krebs Cycle, and to do this it must first be converted in to acetyl CoA.
Krebs Cycle: This is an eight step cycle that amongst other things, removes hydrogen and carbon-dioxide. It also produces a small amount of ATP.
The Electron Transport Chain: The final process in the breakdown of foods. This is where most of the ATP is formed.
How Fat Is Broken Down
There are a number of fats in the body but it?s the triglycerides, or ?neutral fats?, that are usually converted to energy.
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