Garmin appears to be working on a wrist-based blood glucose monitoring feature, as revealed by a recently published patent describing the corresponding sensor technology. Such a system could be a great help for diabetics, but there are still questions.https://www.notebookcheck.net/Garmin-New-non-invasive-technology-for-measuring-blood-sugar-revealed.1031109.0.html
Everybody has some ideas... The question is why nobody is bringing to market...