What your sweat shows about your health

Sweating is mainly used to refresh the body, therefore to maintain it at an ideal temperature, between 36.5 and 37.8 ° C, when it heats too much. It is composed of 99% water plus a whole series of molecules and salt which gives it its salty taste. This is a natural phenomenon since on average a human being loses between 0.5 and one liter of sweat per day. And the latter may well help doctors provide new information about individual health, according to researchers at Simon Fraser University (Canada) who are working on a detection technology under development, described in the journal. scientist “Bio-Design and Manufacturing”.

Concretely, it is about developing a wearable sweat sensor 3D printed, so at low cost. “Innovation in technological design over the past decade has seen the rapid development of wearable sensors, including sweat sensors. These portable sensors can assess health of an individual by analyzing chemicals and other health information contained in sweat. “, Explain the researchers. Unlike collecting and testing other biofluids such as saliva or blood, lThe method does not require any outside assistance. The data collected can play a role in the assessment of stress and the nutrition quality.

A quick, simple and non-invasive method

But not only: sweat sensors can monitor biochemical information in real time during exercise, including ion or lactate levels, which can serve as indicators of hydration and overall physiological and psychological well-being. ” The chemical composition and the physical information derived from sweat is of great value in terms of reflecting the state of human health. », Underlines Pr Woo Soo Kim, main author of the study. This adds: “the direct collection of sweat at the skin surface is a simple and easy-to-perform method that avoids privacy concerns during physical implementation. “

So many benefits that make you sweat bodily fluid to collect easily, frequently and non-invasively. If there are already ranges of low cost wearable sensors that can collect and analyze sweat for assess health of a person, the 3D printable model of these researchers has the particularity of integrating flexible electrochemical sensors and a wireless information sharing functionality. The final idea will be to be able to fix them directly on the skin using a flexible material such as foam, fabric, flexible plastics or rubber and ideally be able to power them through a wireless charging system.

“Metabolites (organic compounds resulting from metabolism) sweat can provide important information that can be used effectively to assess the general health of the wearer. », Concludes Professor Woo Soo Kim. The scientific team warns, however, that more research is still needed to verify the correct correlation between a person’s biological information from sweat and those from blood, and to validate this new information system more broadly.

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