A Wearable RFID Fitness & Calorie Tracker that Mounts to Your Teeth

Shawn Smith

Fitness and calorie monitoring technology is getting interesting. Researchers at the Tufts University Biomedical Engineering Department are experimenting with wearable trackers that mount to your teeth. The tiny monitors use Radio Frequency ID (RFID) technology to track calories, alcohol consumption, multiple types of sugar, and the foods you eat. The researchers also speculate about developing the devices to monitor stress levels from saliva.

The trackers use a square tooth-mounted sensor that is either 4 X 4 or 2 X 2 millimetres. They’re made of titanium and gold and feature detector layers made of either water-based gel or silk fibres.

When testing for the trackers’ ability to detect alcohol and sugar, researchers instructed subjects to swish various liquids. The trackers sent accurate information to tablets and cellphones, distinguishing between liquids such as saliva, water, and alcohols, as well as different types of sugars and their concentrations. Using water-based gel sensors, they were able to track varying temperatures and acidity levels.

These trackers could be a new breakthrough in calorie and fitness tracking. They are not yet available commercially because the researchers are still working out a few kinks and discovering more uses for them.

The Tufts study will be published in the journal, Advanced Materials. For now, you can read it in the Wiley Library below. The paper goes into detail about all the possible uses and the chemicals and nutrients these trackers will likely be able to detect.

Tuft’s Study: Functional, RF‐Trilayer Sensors for Tooth‐Mounted, Wireless Monitoring of the Oral Cavity and Food Consumption

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