• Fat is nothing more than stored energy. When you consume more energy than your body uses, it will store it for further use. When your energy use is higher than the energy (calories) you consume, then the stored energy (fat) will be used to make sure your body has enough energy to function. The energy is used to fuel muscles and facilitate cellular processes. Losing weight is a different matter because where the weight comes from really depends on what you're doing. You could lose weight as a result of fat tissue reduction, muscle mass reduction or even less water retention.
  • The fat is turned into various compounds such as glucose, which cells can burn when you do exercise. These carbohydrates are turned into carbon dioxide and water when they are burned in the cells. The carbon dioxide is then breathed out, and the water is lost through respiration (breathed out), perspiration or urination.
  • Additionally, although the fat does get consumed, the fat cell that stored the fat remains in the body, kind of like a deflated balloon just waiting to be filled up again. It's possible that this is part of the reason some people regain weight very easily and quickly (in addition to returning to poor dietary/exercise choices.)
  • You have the same number of fat cells tday that you had when you were born. The only way to decrease the number is through surgery like liposuction. These cells(like the previous answer stated) can grow or shrink in size according to fuel in and energy out.
  • Fat loss and weight loss are not necessarily the same thing. Weight loss can result from a loss of water retention, lean body mass (muscle) or fat: 1) Water loss is excreted through sweat and urination. 2) Lean body mass is highly metabolic and is lost during caloric shortages when the body canibalizes it's own muscle tissue for energy. 3) After muscles are filled with glycogen stores any excess glucose is converted to pyruvate, then to acetyl CoA. Acetyl CoA can be used for fatty acid synthesis by the liver (i.e. ketones bodies which are used as fuel by several bodily tissues) or stored as triglyceride in adipose (fat) tissue. It is these components that are released into the bloodstream for energy during fat loss, although the fat cell itself remains, just shrinking in size.
  • This is a good question, that did not get a straight up answer. Can someone please give something to understand.

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