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If you’re diabetic, don’t wait for your smartwatch to replace your needles

Sensor array of the Apple Watch Series 8 on a reflective pink surface.
The sensor array is where the health tech magic happens. | Image: Amelia Holowaty Krales / The Verge

Between small signals, regulatory hurdles, skin color, and battery life, there’s a hell of a lot of ground to cover before a smartwatch can measure blood sugar levels.

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