Your Brain on Fat

“The second thing to understand about the brain is that it is hungry. It uses energy like gangbusters. Depending on what source you read, the brain makes up between 2.5-5% of our total body weight, but it uses around 20% of our energy. The reason it uses so much energy is because thought is expensive and basically runs on electricity. All this energy is used to pump ions across membranes, rather like ski lifts taking skiiers to the top of the hill. Once you have enough skiiers at the top, open a gate, set them loose, and they use all the stored energy to zip to the bottom. Thought runs the same way – ions are pumped against a charge gradient, so that when the proper signal comes, you have a whole host of ions to release and start that spark of nerve communication. But it takes a lot of energy to get those skiiers to the top of the hill, and it takes a lot of energy to keep the brain primed and working at maximum efficiency.”

http://www.marksdailyapple.com/your-brain-and-the-primal-blueprint/#more-20796

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