In our guide, we’ll examine how the human brain works, the potential causes of cognitive decline, and things you can do to promote a healthy brain. We’ll also explain why certain things are helpful or harmful to your brain, like why the Mediterranean diet is so beneficial and what a lack of sleep does to your brain. Throughout the guide, we’ll delve into the ever-evolving science of human cognition so you can better understand how to develop a healthier, happier brain.