Wearable health and fitness trackers have taken the world by storm in recent years. But wristbands that monitor your heart rate and how many calories you have burned could soon be old news; researchers have now developed a device that measures sweat chemicals, which could alert users to dehydration, fatigue and more.
[Wearable sweat monitor]
The wearable sweat monitor measures glucose, lactate, sodium and potassium in sweat.
Image credit: Wei Gao et al.

Ali Javey, a professor of electrical engineering and computer science at the University of California-Berkeley, and colleagues publish the details of their creation in the journal Nature.

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