A tech feature that would be a game-changer for health care could be on its way from Apple.

According to Bloomberg, Apple reportedly has made “major progress” in creating a blood glucose monitor for the Apple Watch that doesn’t require pricking. People familiar with Apple’s project have said it is at the proof-of-concept stage, and the company’s making efforts to upgrade the technology from tabletop-sized to a wearable device. 

“What Apple wants to do is it wants to create a system using chips, sensors and software algorithms built into the Apple Watch to get a read on how much glucose you have in your blood without needing a blood sample,” Bloomberg’s Mark Gurman explained about the blood glucose monitor in development.

Based on the outlet’s speculation so far, optical spectroscopy and silicon photonics are the technology that Apple is working on. 

“This means that the technology will use a chip that can output lasers into your skin…and sensors that could read the concentration of light in your skin to know how much glucose is there in order to get that reading,” Gurman said.

In addition to giving people access to an easier way to track their blood glucose, Bloomberg insiders shared that innovative technology such as this would alert people who are pre-diabetic, which would increase the likelihood of Type 2 (adult onset) diabetes prevention.

Historically secretive, Apple has yet to comment on the technology.

The outlet detailed that Apple’s work in progress started in 2010 after the late Steve Jobs had his company acquire RareLight. According to Crunchbase, it is a “medical device that attempts non-invasive glucose measurement.”

What’s more, Apple reportedly has discreetly been operating in an isolated firm, Avolonte Health, but folded it into a previously unknown Exploratory Design Group.

According to Bloomberg, RareLight’s founder, Bob Messerschmidt, told the outlet that the upcoming monitor wouldn’t have been possible if Apple hadn’t purchased his invention in 2010.

Although progress has been made for the feature, the outlet claims that Apple still won’t be able to officially bring the device to market for several years to come.