How does metabolize fat exit the body

So, for example, to burn 10 kilograms 22 lbs. And the chemical process of burning that fat will produce 28 kg 62 lbs. The researchers showed that during weight loss, 84 percent of the fat that is lost turns into carbon dioxide and leaves the body through the lungs, whereas the remaining 16 percent becomes water, according to the study published today Dec.

The water formed may be excreted in the urine, feces, sweat, breath, tears or other bodily fluids, and is readily replenished," the researchers said. The calculations also show the frightening power of, for example, a small muffin over an hour of exercise: At rest, a person who weighs pounds 70 kg exhales just 8. Protein shares the same fate, except for the small part that turns into urea and other solids, which you excrete as urine.

The only thing in food that makes it to your colon undigested and intact is dietary fibre think corn. But energy is a notoriously confusing concept, even among health professionals and scientists who study obesity. The reason we gain or lose weight is much less mysterious if we keep track of all the kilograms, too, not just those enigmatic kilojoules or calories. According to the latest government figures , Australians consume 3.

Of that, grams is solid macronutrients, 23 grams is fibre and the remaining 3kg is water. Read more: Why we regain weight after drastic dieting.

If you put 3. So how do you make this happen? The grams of carbohydrates, fats, protein and alcohol most Australians eat every day will produce exactly grams of carbon dioxide plus grams of water about one cup and about 35 grams of urea and other solids excreted as urine. No pill or potion you can buy will increase that figure, despite the bold claims you might have heard.

Read more: Five supplements that claim to speed up weight loss — and what the science says. Fat from food is stored in the body in cells called adipocytes. It is stored as a compound called triglyceride. Triglyceride consists of three kinds of atoms; carbon, hydrogen and oxygen, and this means that when it is broken down around a fifth of it forms water H2O and four-fifths becomes carbon dioxide CO2.

The water formed may be excreted in the urine, faeces, sweat, breath, tears, or other bodily fluids and is readily replenished by drinking water. But the exhaled carbon in CO2 can only be replaced by eating food or consuming beverages such as fruit juice. The study authors, Ruben Meerman and Andrew Brown from The University of New South Wales, said: "None of this biochemistry is new, but for unknown reasons it seems nobody has thought of performing these calculations before.

They estimate that an average person loses at least g of carbon every day and roughly a third of that occurs as we sleep. Replacing one hour of rest with moderate intensity exercise, such as jogging, removes an additional 40g of carbon from the body, raising the total by about a fifth to g.

So to keep weight off you need to balance what you eat against what you burn off and exhale.