Once upon a time, people believed that you use only 10 percent of your brain, that when you were born you had all the brain cells you were ever going to have, and that some people are left-brained and some people are right-brained. (Do you still believe that one? Lots of people do. But it’s not true.)
Our understanding of the brain is always changing. So it might be that some of the brain hacks we’ve noted in this book will someday prove to be untrue, or that new research might cast doubt on previous conclusions. What’s a brain-centric person to do? The answer is that the more brain-supporting things you do, the better. That way, if it turns out that one brain hack isn’t effective (maybe blueberries aren’t the super food we think they are), you’ll still have benefited because you’ve also exercised, volunteered, and eaten your carotenoids. In other words, the more you do to help keep your brain healthy, the better.