Ever wondered where the fat goes when we lose weight ? Most of it is breathed out as carbon dioxide, according to the new study.Lungs are the primary excretory organ for weight loss .We set out a calculate how we lose fat.


Human fat cell store triglyceride,which consists of just three kinds of atoms; carbon,hydrogen and oxygen.Shedding unwanted fat requires unlocking the atoms in triglyceride molecules by a process known as oxidation.

By tracing every atoms pathway out of the body,the researchers discovered that when 10kg of fat are fully oxidized, 8.4kg departs via the lungs as carbon dioxide. The remaining 1.6kg becomes water. The analysis showed that the inhaled oxygen required for this metabolic process weights nearly three times more than the fat being ‘lost’.

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To completely oxidize 10kg of human fat,29kg of oxygen must be inhaled producing a total of 28kg of carbon dioxide  and 11kg of water.”Non of this biochemistry is new,but for unknow reasons it seems nobody has thought of performing these calculation before. The quantities makes perfect sense but we are surprised by the numbers that popped out.

These results show that lungs are the primary excretory organ for weight loss.The water formed may be excreted in the urine,sweat,tears or other body fluids and is readily replenished ..

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Source: DRS