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MacRumors Headlines:

Oct 2021 - Apple Watch Series 8 Suppliers Developing Blood Glucose Monitoring Components

Dec 2021 - Prosser Predicts Next Apple Watch to Include Blood Glucose Monitoring

Feb 2021 - Apple Patents Point to Blood Glucose Monitoring Innovation

May 2022 - Bloomberg Reports AW S8 to Include Blood Glucose Monitoring and a Squared Off Design

Jul 2022 - Reports of Manufacturing Challenges for AW S8 New Sensor Technology

Sep 2022 - AW S8 Launches - Same as S7 with New Colors, Even Brighter Screen and 5G Technology
 
If this actually works properly (I highly doubt it), this watch will be sold out for months

Something tells me apple would want to include such a feature but also say it’s an entertainment feature like the blood oxygen one.
 
That would be huge. I'd also be interested in the hydration level monitoring that was rumored a little while back.
 
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maybe they can ask Theranos for some help on the new tech ;) but I thought we’re still stuck using blood samples for blood glucose readings
Even for Theranos, it required a finger prick which is an invasive method. I think they were advertising that only from a small drop of blood (via finger prick) that they could use that enough sample is there for a whole bevvy of tests.
 
Now THIS is a rumor I’d be willing to upgrade for! Providing it turns out to be true. Otherwise, I couldn’t be happier with my Apple Watch 6 ?
 
I'd just be happy for next year's Dexcom G7 to be able to be read directly by the AW instead of requiring an iPhone like my G6. I was all set to pull the trigger on a Series 7 if it could either read my CGM or check my glucose directly, but since it did neither I guess I will just wait.

FWIW, the Dexcom G6, an "invasive" Continuous Glucose Meter that is US FDA approved, has a margin of error of up to 20% compared to the reading from a finger stick. https://www.dexcom.com/faqs/is-my-dexcom-sensor-accurate
 
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The rumors of blood glucose monitoring in Apple Watch has been going on for years. There's a reason it's not here yet. My wife has one of the "newest and most high-tec" insulin pumps on the market(that's been approved in Norway). It has a needle inside her for blood glucose monitoring and she still has to "calibrate" with a regular "needle in the finger"-machine 2-3 times a day. Doing this non-obtrusive on a watch will most likely be highly inaccurate, especially in the beginning.
Holy crap if you have to calibrate 2-3 daily then why bother with CGM at all? I calibrate my Dexcom G6 once every 10 days (~24 hours after installing a new sensor).
 
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