So I know that if your body needs to it can use excess fat to provide itself with energy, and I’ve read that this fat is processed by the liver. But what I don’t understand is how this fat gets from your legs or arm for example to your liver.
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Fat is burned in the mitochondria of the cells, and the vast majority of cells have mitochondria and therefore can burn fat directly. There are two exceptions:
Red blood cells don’t have mitochondria, so they can’t burn fat…
There is something known as the blood/brain barrier that prevents most fats from getting to brain cells. If there’s not enough glucose to run the brain, the liver converts fats to ketones which are small enough to get to the brain cells.
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