A filing with the US Securities and Exchange Commission (SEC) has led to some speculation that a future Apple wearable, possibly even the expected Apple Watch Series 7, could be fitted with a non-invasive glucose indicator. On top of that, an Apple Watch 7 may even sport an alcohol monitor, thanks to Rockley Photonics' expertise.
https://www.notebookcheck.net/Apple-Watch-Series-7-takes-a-step-closer-to-offering-a-non-invasive-glucose-monitor-and-even-an-alcohol-level-sensor.537233.0.html