New Skin Patch Can Track Health Through Sweat

Ever hear the saying that sweat is fat crying? Well, let those tears be put to use! Researchers have been developing a new skin patch that tests sweat droplets as you work out, and the results are streamed to your smartphone.

According to, it is a little bigger than the size of a quarter and sticks to the skin. They also said that they did a study on how well it worked on bicyclists — even in that heavy sweat, long period of time, and movement, it stayed on and worked!

John A. Rogers, director of the Northwestern University’s Bio-Integrated Electronics Center, said that “Sweat has biochemical components within it that tell us a lot about physiological health.”

Most technology today allows people to keep track of their daily caloric intake, measure their heart rate during a workout, and record their exercise activity. Unlike the Fitbit, this new patch is completely different from the rest.

Since it is actually testing your sweat, it can tell you things that no other device can. Before you begin to feel dehydrated, it can tell you when you need to replenish your electrolytes. Researchers are also trying to expand the devices’ capabilities so that it can help with military train or screening people with diabetes or other diseases.

How does it work?

The article starts by explaining that you are supposed to put the patch on your skin and begin your exercise. Little passages collect the sweat and direct it to different sections of the patch where it mixes with different chemicals. This combination makes a part of the patch change colors, and this indicates the sweat’s level of acidity and lactate, chloride, and glucose concentration.

All of these measurements can tell the person how hydrated they are and how many electrolytes they have. If you put the app on your phone and hold your smartphone over the patch, the app will translate the levels so that you will understand what they mean.

Zhenan Bao, a chemical engineering professor at Stanford University, said that “such a patch allows people to now have an opportunity to understand their health and how it changes depending on activities.”

These sweat patches are meant for a one-time use and will last for a few hours. This super cool technology will be essential for all exercise fanatics! Sweat may just become your new best friend!

Erica D'Arcangelo is an Internet Marketing Expert and co-owner of Fresh, Healthy & Fit where she is a regular contributor. Erica has been active in the health and fitness industry through spinning, yoga, HITT training and much more over the last decade. She's a fitness enthusiast and has also helped others with healthy living through her own blog.