I read that it would be stricly optical: https://appleinsider.com/articles/21/07/14/apple-supplier-launches-non-invasive-glucose-monitor-health-sensor-tech htt

I read that it would be stricly optical: https://appleinsider.com/articles/21/07/14/apple-supplier-launches-non-invasive-glucose-monitor-health-sensor-tech https://appleinsider.com/articles/21/07/14/apple-supplier-la... "Rockley Photonics says that its system uses infrared spectrophotometers to detect and monitor a wider range of health issue than the green LED systems in most wrist devices." I also remember paging through this fascinating investor presentation document from Rockley: https://rockleyphotonics.com/wp-content/uploads/2021/06/Rockley-Investor-Presentation-2021-06.pdf https://rockleyphotonics.com/wp-content/uploads/2021/06/Rock... HN discussion from a few months ago on this specific topic: https://news.ycombinator.com/item?id=27030689 https://news.ycombinator.com/item?id=27030689