There is energy from the food that we just ate, and then there is energy from the fat reserves. I was wondering, how much time would I have left to get rid of the calories of a meal I just ate, before it becomes fat. I’m guessing that this transition most probably isn’t as simple as that, but I believe I have made the idea clear. Also, how is this transformation done?
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Your food needs to be digested before it turns to fat. Once its digested the nutrients are sent into your bloodstream from your gut. What is not immediately used for energy and construction is sent to the liver to be converted to fat.
Regular fat in your food can be turned into stored fat in about 4 hours (https://www.sciencefocus.com/science/how-long-before-extra-calories-show-on-the-scales/)
Others such as proteins need to be processed for longer.
By burning off food people mean burning calories so that it’s s net positive. Say you eat 300 calories. You want to burn off those 300 but you are not burning the cheeseburger you just ate but perhaps the one you ate 2 days ago that is now stored fat.
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