Assuming you are severely waisted, and you want to lose around 20 pounds by controlling your carbohydrate intake and engage in fat burning activities. In what form will your body release those fats?

Question

Assuming you are severely waisted, and you want to lose around 20 pounds by controlling your carbohydrate intake and engage in fat burning activities. In what form will your body release those fats? 

Answer 1

Well, yes and no!

In general, if you start to burn your fat, you burn some to CO2 and some eventually gets converted to ketones (your breath smells fruity), also. Since ketones are also an indication of possible ketoacidosis (which is deadly), you should previously have been cleared re/ diabetes for prolongued exercise by your doctor. Just the ketones are OK, and may make your weight loss faster since they obviously haven't been burned off to CO2.

It's a lot easier to not put the fat on in the first place, and regular exercise will help with that.

-- Cheers, -- Mr. d.

Answer 2

Your body will use metabolic pathways to release fats. The byproducts of these processes include carbon dioxide, which is exhaled from the lungs, and water, which is sweated or urinated out. Heat is another byproduct, which is used to maintain body temperature and other physical processes.

Fat is stored in the body as triglycerides (molecules of carbon, hydrogen, and oxygen). Through oxidation, these triglycerides are broken down, consuming oxygen and producing CO2 and H20, as well as heat.

For a little more elaboration: triglycerides are broken into fatty acid and glycerol components through lipolysis. These fatty acids are broken down with beta-oxidation to make acetyl-CoA, used in the Krebs/citric acid cycle (remember this as part of cellular respiration) to produce ATP and electron carriers NADH and FADH2. Therefore, since you are limiting carbohydrate consumption and there is not much glucose entering your body in your diet, fat molecules will provide a lot of energy for cellular respiration, which produces CO2 and H20!