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A “lab on skin” is a flexible patch that collects and analyzes sweat, then sends readings wirelessly to an external device such as a smartphone. A 2016 report described a research patch that measured several sweat-related signals during exercise. That is physiological monitoring—not a validated medical health check: the available reports do not establish that the patch can diagnose a condition or replace clinical testing.
How the 2016 lab-on-skin patch worked
The patch used microfluidics—tiny channels that guide liquid through a device—to direct sweat into four chambers. Each chamber contained a different color-changing indicator. The indicators responded to analytes in the sweat, while a phone camera and image-capture software supported colorimetric analysis. The patch could communicate wirelessly with external devices, including smartphones. Chemistry World’s 2016 report describes the system and identifies the underlying study by A. Koh and colleagues, published in Science Translational Medicine (DOI: 10.1126/scitranslmed.aaf2593).
What it measured
The 2016 report lists sweat lactate, chloride, glucose, pH, and the body’s rate of water loss. These are measurements made by the research platform; a color change or phone reading does not by itself establish an athlete’s hydration status, illness, or readiness to compete.
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What happened in the reported cycling test
Chemistry World reported that researchers tested the patch during a 104 km cycling race, with patches worn on the arms and backs of 12 riders. The report says the sensors performed despite changes in temperature and humidity, and that participants reported no discomfort or patch detachment. Those observations describe this particular reported field test, not proof of performance across athletes, sports, or environments.
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- Real-Time Hydration Data & Alerts - Stay optimally hydrated with real-time, personalized data and notifications sent directly to your phone, watch, or bike computer. Nix's hydration monitor analyzes your sweat as you train, quantifying exactly when, what, and how much to drink for peak performance. The perfect fitness tracker for endurance athletes training for their next marathon, Ironman or triathlon.
- Sweat-Powered, Science-Backed Performance - Nix is the first biosensor to scientifically analyze sweat and deliver real-time hydration insights. Track your fluid, electrolyte, and sodium losses using your own biomarkers - no needles, no pricks, just a single-use adhesive patch that works only when you’re actively sweating. It requires as little as 4.5 microliters of sweat to obtain a reading.
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The report does not provide clinical diagnostic-performance measures for the patch. The available account also does not establish a population-level validation or support extrapolating the small field test to all athletes.
A separate 2025 sports sensor measured different signals
A 2025 Talanta paper describes a different integrated sports lab-on-skin sensor. Its abstract reports wireless, on-body measurement of sweat sodium (Na+), potassium (K+), lactate, and initial sweat rate. The researchers studied physically trained and untrained groups exercising at the same intensity and assessed how water intake, breakfast, and exercise intensity influenced dehydration time and sweat measurements. The paper’s abstract is available through PubMed.
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This later system should not be confused with the 2016 patch: the reported analytes and study conditions differ. The 2017 ACS Nano review places lab-on-skin within a broader research area covering flexible and stretchable wearable electronics, including sweat analysis and other monitoring applications; it does not establish that the 2016 patch became a consumer or clinical product.
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In this context, “health check” is headline shorthand for collecting physiological information during exercise. Sweat sensing may help researchers monitor bodily signals, but the reports described here do not show that either patch is a validated diagnostic test, has regulatory authorization for diagnosing disease, or can replace a clinician’s assessment or laboratory testing. A sweat measurement should not be treated as a standalone diagnosis or as proof that an athlete is safe to continue exercising.
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How to compare the research systems
The meaningful comparison is between what each research device measured and how it was studied—not between retail products. The available sources do not establish that either system is commercially available.
Quick Recap
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- Long-lasting:Onida dexcom g7 over patches are made with a strong durable adhesive designed to provide extended wear time.Please press carefully around the edges after pasting to make it stick more firmly.
- Waterproof & Sweatproof:Our Dexcom g7 adhesive patches are waterproof and sweatproof,Dexcom patches use the highly breathable woven fabric that will never fray or trap moisture.
- Hypoallergenic:Onida g7 dexcom over patches are hypoallergenic, latex-free and breathable with innovative woven fabric material. Virtually painless removal and no sticky residue on your skin.
- Easy to ues:The design of the back ear allows you to use it independently with one hand, without unnecessary waste.Stabilize and fix your sensor on your skin without moving.
- No-Hole design:Our Dexcom g7 patches are designed no-hole, no-adhesive to protect your sensor,this design does not interfere with sensor readings and makes it easier to replace the adhesive patches.
| Research system | Reported measurements | Collection and readout described | Reported study context | Diagnostic validation or retail availability |
|---|---|---|---|---|
| 2016 patch, described by Chemistry World | Lactate, chloride, glucose, pH, and rate of water loss | Microfluidics directed sweat into four chambers with color-changing indicators; a phone camera and image-capture software supported analysis, and the patch communicated wirelessly. | Reported test during a 104 km cycling race with 12 riders. | Not established in the 2016 report. |
| 2025 integrated sports lab-on-skin sensor, described in the Talanta abstract | Sodium (Na+), potassium, lactate, and initial sweat rate | Wireless on-body measurement is reported; the abstract does not state a chamber design or phone-camera readout. | Physically trained and untrained groups; study conditions included exercise intensity, water intake, and breakfast. | Not established in the paper abstract. |
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