Your brain makes up only 2% of your bodyweight but is doing so much every second of every day, it takes 20% of the body’s total energy supply! That means it makes big demands on fuel supplies and if it runs short, so will your cognitive abilities.
It runs mostly on carbohydrates and they come from the food you eat and from small amounts stored in your body. But those supplies don’t last long and when the brain needs extra it uses body muscle, which can be converted into carbohydrate, to fill the gaps.
That’s great for keeping the brain going, but not so good for your muscles so it’s important to eat carbohydrate and protein foods regularly to keep both firing well.
For a more detailed explanation and food suggestions, Chapter 2 in Eat To Cheat Ageing is all about your brain.
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