Fitness trackers have hit something of a ceiling in what they can glean from your vitals.
Some like the Fitbit Charge HR and the Microsoft Band can monitor a user’s heart rate throughout the day, continuously — an impressive insight, but it’s about as far as the tech goes right now.
Wearables can’t see what’s going on inside your bloodstream.
Echo Labs, a small startup from the Stanford-affiliated Start X incubator, may be among the first to take health monitoring to the next level.
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