Is More Data About Your Body Actually Good for You?

The Silicon Valley health trend making doctors nervous.

By David Wallace-Wells and Rachael Bedard

Produced by Jillian Weinberger

Americans have spent billions of dollars tracking themselves: their steps, their blood oxygen saturation, their sleep cycles, their glucose levels. Is any of this data making us healthier?

That’s the question the Opinion writer David Wallace-Wells poses to Dr. Rachael Bedard, an........

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