The National Institute of Standards and Technology (NIST) in the US has recently unveiled a new technique that uses a magnetometer on a standard cell phone to accurately measure blood glucose levels. Modern cell phones are equipped with magnetometers that function like a compass by detecting the Earth’s magnetic field. Researchers have found a new use for this feature in examining blood glucose concentrations and other biomarkers.

In their proof-of-concept study, the researchers attached a small container of a solution, representing blood, and a hydrogel strip to a mobile phone. Hydrogel is a porous material that expands when exposed to water. By embedding magnetic particles in the hydrogel and modifying it to respond to glucose levels or pH, the researchers were able to detect changes in the strength of the magnetic field using the phone’s magnetometer.

The NIST team believes this technology could lead to cost-effective glucose monitoring solutions that are readily available. The smart hydrogels used in the study are affordable and easy to manufacture, making them potential candidates for commercial test kits that could be attached to smartphones to measure glucose levels. Using existing smartphone technology, this approach offers a low-cost alternative to current glucose monitoring devices.

The results of the study were published in the journal Nature Communications, showing the potential of using smartphones for innovative healthcare applications. This advance could pave the way for convenient and affordable at-home blood glucose monitoring, offering a promising solution for people with diabetes and other health conditions.

By Samantha Johnson

As a dedicated content writer at, I immerse myself in the art of storytelling through words. With a keen eye for detail and a passion for crafting engaging narratives, I strive to captivate our audience with each piece I create. Whether I'm covering breaking news, delving into feature articles, or exploring thought-provoking editorials, my goal remains constant: to inform, entertain, and inspire through the power of writing. Join me on this journalistic journey as we navigate through the ever-evolving media landscape together.

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