When you put your brain first, everything else health-wise falls into place. The brain is ground zero. Don't forget that it is what makes you. Your heart ticks, yes, but it's your brain that ultimately makes you tick and determines your quality of life. Without a healthy brain, you cannot even make healthy decisions. And with a healthy brain comes not only a healthy body, weight, heart, and so on, but also a stronger sense of confidence, a more solid financial future thanks to smart decisions, better relationships, more love in your life, and heightened overall happiness.

- from Keep Sharp book by Sanjay Gupta

Social isolation and feelings of loneliness are on the rise in our society. It's the paradox of our era: We are hyperconnected through digital media yet increasingly drifting apart from each other and suffering from loneliness because we lack authentic connection. This absence of real connection is epidemic, and medicine is increasingly recognizing it as having dire physical, mental, and emotional consequences.

- from Keep Sharp book by Sanjay Gupta

Your body does not momentarily press the pause button during sleep. It's more like a reset button because sleep is a necessary phase of regeneration. Billions of molecular tasks go on during sleep at the cellular level to ensure that you can live another day. Sufficient sleep keeps you sharp, creative, attentive, and able to process information quickly.

- from Keep Sharp book by Sanjay Gupta