Sweat, the cooling system of your body, is made almost completely of water, with tiny amounts of other chemicals, including ammonia, urea, salts, and sugar. Remarkably, these chemicals along with the small molecules and peptides they contain can reveal what is going on inside your body. For this reason, scientists are trying to harness sweat through some form of wearable technology and turn it into a new way to measure and monitor your immediate health. “Sweat contains a trove of medical information and can provide it in almost real time,” wrote Dr. Jason Heikenfeld, associate professor of electronic and computing systems, University of Cincinnati, in an article for IEEE Spectrum.
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