In 2014, James Hamblin launched a series of videos for The Atlantic called "If Our Bodies Could Talk." Now Hamblin explores the human stories behind health questions that never seem to go away -- and which tend to be mischaracterized and oversimplified by marketing and news media. He covers topics such as sleep, aging, diet, and much more: Can I "boost" my immune system? Does caffeine make me live longer? Do we still not know if cell phones cause cancer? How much sleep do I actually need? Is there any harm in taking a multivitamin? Is life long enough? In considering these questions, Hamblin draws from his own medical training as well from hundreds of interviews with distinguished scientists and medical practitioners.

Prologue: If I lose a contact lens in my eye, can it get into my brain? -- What is normal? -- What is health? -- Appearing: The superficial parts -- Perceiving: The feeling parts -- Eating: The sustaining parts -- Drinking: The hydrating parts -- Relating: The sex parts -- Enduring: The dying parts.