I asked Google Bard how the Afon worked -

How does the Afon Glucowear continuous glucose monitor work?

The Afon Glucowear continuous glucose monitor (CGM) works by using near-infrared spectroscopy (NIRS) to measure the amount of glucose in the interstitial fluid (ISF) beneath the skin. NIRS is a non-invasive technique that uses light to measure the absorption of different wavelengths of light by molecules in the body. In the case of Glucowear, the NIRS sensor is embedded in a watch-like device that is worn on the wrist. The sensor emits light of different wavelengths, and the amount of light that is absorbed by the ISF is used to calculate the glucose concentration.

The Glucowear CGM is still in development, but the company has conducted several clinical trials that have shown promising results. In one study, the Glucowear CGM was able to accurately measure glucose levels in people with type 1 diabetes. The study also found that the Glucowear CGM was able to provide real-time feedback on glucose levels, which could help people with diabetes to better manage their condition.

If the Glucowear CGM is successful, it could revolutionize the way that diabetes is managed. Currently, people with diabetes must prick their fingers several times a day to measure their blood glucose levels. The Glucowear CGM would allow people to monitor their glucose levels continuously, which could help them to avoid dangerous spikes and drops in blood sugar.

Here are some of the benefits of using the Afon Glucowear CGM:

It is non-invasive, so there is no pain involved in using it. It provides real-time feedback on glucose levels, which can help people with diabetes to better manage their condition. It can be used to track trends in glucose levels, which can help people to identify patterns and make changes to their diet or medication. It can be used to set alerts for high or low glucose levels, which can help to prevent serious complications. The Afon Glucowear CGM is still in development, but it has the potential to revolutionize the way that diabetes is managed. If it is successful, it could make it easier for people with diabetes to live healthy and active lives.