Apple Watch Blood Glucose Monitoring Delayed Up to Seven Years.

Apple's noninvasive blood glucose monitoring technology for the Apple Watch is still three to seven years away from launch, according to Bloomberg journalist Mark Gurman. The technology uses a silicon photonics chip to shine light from a laser under the skin to determine the concentration of glucose in the body. Apple has been conducting human trials for the past 10 years and seeks to be able to warn Apple Watch users if they are prediabetic to encourage lifestyle changes before diabetes develops.