Health / Diet Trivia : When using a brain to be bright and be a diet?

When using a brain, you'll be bright and moreover is it also a diet?







The weight of a brain is about 1400 grams and it's about 2 % of the weight. 
However, the energy a brain consumes accounts for 20% of the energy the whole body consumes. When the consumption calorie during a day is assumed to be 2000Kcal, 400 kcal (It is about 100g in glucose) will be consumed only by the brain. 

The human brain uses the maximum energy only by alive. In other words, calorie consumption of the brain doesn't increase by considering more and doing brain teasers.