A source said that Cook was wearing a prototype glucose-tracker on the Apple Watch, which points to future applications that would make the device a "must have" for millions of people with diabetes -- or at risk for the disease.
Previous reports have suggested that Apple is working on a way for users to monitor their blood sugar levels without needing to penetrate their skin.
Notably, in a talk with students at the University of Glasgow in February, Cook revealed that he had been wearing a continuous glucose monitor for a few weeks.
"I've been wearing a continuous glucose monitor for a few weeks," he said. "I just took it off before coming on this trip."
He also noted that current finger prick solutions are burdensome.
"It's mentally anguishing to stick yourself many times a day to check your blood sugar," said Cook. "There is lots of hope out there that if someone has constant knowledge of what they're eating, they can instantly know what causes the response... and that they can adjust well before they become diabetic."
"This is an area where I'm very excited about Apple's contribution," he said. "Very excited."
Just a couple days ago another report claimed that Apple is planning to update its Apple Watch with glucose monitoring capabilities for diabetics and smart bands that add additional functionality.
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