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Glucose is the only fuel normally used by brain cells. Because neurons cannot store glucose, they depend on the bloodstream to deliver a constant supply blood glucose. A process called glycogenolysis can break down glycogen stored in the liver to glucose. This then travels in the blood to your brain or muscles in need of glucose.

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14y ago
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13y ago

No, the brain is made of mostly nerve cells and tissue, not fat.

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Q: Is fat is the primary fuel for the brain?
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