Apple Watch models may use sweat to check your health status, here’s how
Apple's patent application describes how the Apple Watch can measure health metrics using sweat. It can provide data to athletes, guide fluid intake, and has potential applications in sobriety tests and medical measurements like cystic fibrosis.
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Apple's patent application describes how the Apple Watch can measure health metrics using sweat. It can provide data to athletes, guide fluid intake, and has potential applications in sobriety tests and medical measurements like cystic fibrosis. 
