The sensors can be built into an armband, integrated into articles of clothing, or even be made into microneedles that sample directly from just beneath the surface of the skin. When they touch the skin, they’re able to measure sodium, chloride, calcium, magnesium, ammonium, glucose, uric acid, as well as amino acids such as glycine.
The technology will hopefully be used by athletes to warn them to rehydrate when necessary, as well as people with renal diseases and diabetes.
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