How and when does FAT leave the body??

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2

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  • Chief_Rocka
    Chief_Rocka Posts: 4,710 Member
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    Like that:

    Metabolism_790px_partly_labeled.png
  • Lleldiranne
    Lleldiranne Posts: 5,516 Member
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    Cell biology explanation:

    Fat (lipids) are long chains of molecules. When the chains are broken in the right place, it liberates a lot of energy. The energy is used to turn ADP + phosphate into ATP, which is what cells use for energy (breaking it back into ADP + phosphate). So, you have this broken chain of molecules which are useless to the body. The blood pulls them from the cell (through the cell wall, the same way water, glucose chains, and everything else goes into and out of the cell). The kidneys (and sometimes liver, but mostly kidneys) filter the blood, pulling the broken chains out. This is part of what is in your urine. So, you pee out the remnants of the fat.

    ETA: it's been almost 15 years since I took cell biology in college, so I'm sure I've forgotten a significant amount of the details, but I think I got the basics about right.
  • WendyTerry420
    WendyTerry420 Posts: 13,274 Member
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    Like that:

    Metabolism_790px_partly_labeled.png

    Thank God someone finally simplified it! :flowerforyou:
  • cedarghost
    cedarghost Posts: 621 Member
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    Like that:

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    Haha!
  • Yanicka1
    Yanicka1 Posts: 4,564 Member
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    Like that:

    Metabolism_790px_partly_labeled.png

    Make sens
  • junodog1
    junodog1 Posts: 4,792 Member
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    When you are sleeping, the fat cells that you have p1ssed off that day pack their bags and leave, looking for someone who will feed them. If you eat too much, those wandering fat cells come to you in your sleep. They may or may not be delivered by a stork or some other wild life.
  • BACONJOKESRSOFUNNY
    BACONJOKESRSOFUNNY Posts: 666 Member
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    when you are burning fat look for when thing when you go to toilet to pee you will notice something white in your pee is like chicken fat thats how some of your fat comes out n some as a sweat. because when i did a diet few years back when the white thing came in pee i got scared that its something serious but found out its nothing just fat so a doctor knows best.
  • _Elemenopee_
    _Elemenopee_ Posts: 2,665 Member
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    Through excretion when you're excreting bodily waste.
  • nixirain
    nixirain Posts: 448 Member
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    This post reminded me of this one.

    http://www.myfitnesspal.com/topics/show/438315-when-is-a-pound-lost-and-where-does-it-go
  • Laura80111
    Laura80111 Posts: 958 Member
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    Like that:

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    Yep that's the best I've read so far:laugh:
  • peachea
    peachea Posts: 92 Member
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    It isn't fat at that point - it is converted to FFA , then leaves the fat cell & goes into the blood, and then it is sent to and absorbed into muscle cells and burned there in the mitochondria. it's all in the article.

    ^this

    Mitochondria is the powerhouse of energy cells.
  • snugsmontreal
    snugsmontreal Posts: 3
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    fat can leave 2 ways, and that depends on which fat youre talking about. fat that is undigested goes straight out the back end...so to speak. the fat stored in fat cells is broken down into 2 components glycerol and fatty acids. when your body is in the post-absorbative state (+/- 4 hours after eating) your brain still needs sugar/glucose that is no longer circulating in your blood so you liver starts playing chemist by breaking down fat and use part of it to fuel your muscles and other functions than your brain (fatty acids) and the glycerol goes into a processes called gluconeogenesis (creation of new glucose by putting together broken down fats and proteins) to be circulated to keep your brain functioning.

    and THAT is how fat leaves...
  • ropermom
    ropermom Posts: 52 Member
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    Just glad it does!(leave the body)
  • raeleek
    raeleek Posts: 414 Member
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    I always wonder about this too, and no explanation has ever really cleared it up completely. There is 112 pounds of me GONE, and it seems like I should have seen it leaving!!

    HA HA! Cute! That literally made me laugh!
  • KeriA
    KeriA Posts: 3,275 Member
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    I have read that you keep the same number of fat cells but they shrink in size as you burn the fat.
  • heybales
    heybales Posts: 18,842 Member
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    I have read that you keep the same number of fat cells but they shrink in size as you burn the fat.

    And the double-bummer to that - when you pack it on, once they get big enough, you grow more cells that grow larger.

    But when fat is lost, you don't lose the extra cells. Always more available to use for future.
  • dianad11
    dianad11 Posts: 6 Member
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    Fat is stored energy that your body can use. It is not as efficient as glucose but when your muscles are active and running low on energy (aka glucose being converted to ATP) they can covert it. Cells that are responsible for providing energy have organelles called mitochondria. The mitochondria are responsible for the process that creates the ATP. So, muscles that require lots of energy and especially quick energy, will have cells with many mitochondria present in each cell to try to keep up with the energy needs of the muscle. See mathjulz explanation for the remainder .... It is pretty darn good. You have a very good memory, mathjulz. I personally have CRS. :(

    Energy can be gotten anaerobically as well. When muscles are at rest, they can tap into lipids for energy and conserve ATP, but this process is not efficient enough to provide necessary energy for lots of activity.

    So, the more muscle you have......not just bulky, sexy, hot, muscle, but all muscle, including cardiovascular and smooth muscle, the more energy you will burn. Cardio and weight bearing exercises burn energy, build muscles that continue to burn energy, and make your insides happy, too. Smooth muscles can be found internally and help to move blood along your vessels, for instance. ( They surround the vessels. That is just one example of smooth muscle. ) you have 3 muscle types, smooth, skeletal, and cardio.

    That's all I got without an anatomy and physiology lesson and ridiculously unpronounceable words.
  • Shanthornton
    Shanthornton Posts: 36
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    Like that:

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  • Shanthornton
    Shanthornton Posts: 36
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    LOL!! Wow.. thanx
  • etoiles_argentees
    etoiles_argentees Posts: 2,827 Member
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    I have read that you keep the same number of fat cells but they shrink in size as you burn the fat.

    And the double-bummer to that - when you pack it on, once they get big enough, you grow more cells that grow larger.

    But when fat is lost, you don't lose the extra cells. Always more available to use for future.

    True.

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