Brain training is big business. Companies like BrainHQ, Lumosity, and Cogmed are part of a multimillion-dollar business that is expected to surpass $3 billion by 2020. But does what they offer actually benefit your brain?
Researchers don't believe so. In fact, the University of Illinois determined that there's little or no evidence that these games improve anything more than the specific tasks being trained. Lumosity's maker was even fined $2 million for false claims.
So, if these brain games don't work, then what will keep your brain sharp? The answer? Learning to play a musical instrument.