Last year, the US government hosted a competition to develop a new alcohol monitoring wearable and ended up giving the $200,000 first prize to San Francisco-based, BACtrack, for creating a prototype of a wrist wearable that can detect alcohol diffusing through a person’s skin.
The wearable works by studying blood alcohol levels through the skin using fuel cell technology. While most alcohol is processed within a person’s body, some molecules escape through the skin in the form of ethanol

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