With as many nerve cells as there are stars in the Milky Way (approximately 100 billion), your brain accounts for 2.5 percent of your body's total weight and uses up to 20 percent of your total energy supply. With proper use, care and knowledge, you have the means for decreasing your brain's age at any stage of your life. This article will give you some simple tests for calculating your current brain age and will then give you some ideas for how to sharpen your mental abilities.
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