This is the first time I have heard glucose meters being used specifically for weight loss, very interesting. If this is a safe and effective way to encourage weight loss, this could be a huge business opportunity.
Link: http://www.cell.com/cell/fulltext/S0092-8674%2815%2901481-6
Dexcom has a CGM system that hooks up to your phone/watch, but is only available with prescription (and is extremely expensive without coverage), so this is effectively only available if you already have severe health problems.
Some former Dexcom employees founded a startup some time ago to do CGM for preventative healthcare, but I haven't heard anything of where it went. http://mobihealthnews.com/32601/dexcom-alums-develop-blood-s...
There are probably others.
To me these sorts of subcutaneous CGM systems seem more convenient for users than other initiatives (e.g, the contact lens projects). The sensor stays embedded for a week at a time, you can sleep with it in, and you get measurements every 5 minutes or so.
Can you elaborate ? What do you mean by extremely expensive ?
My "extremely expensive" was unfair. Some quick searching suggests ~$650 for the transmitter ~$100/week for sensors. "Not cheap" would be more accurate.
Don't let the fact that lifesaving treatments are often even more unaffordable shift your frame of reference.
It is, presuming that your macros and micros are still in line. It's easy to eat the same meal for lunch and dinner every day and lose weight but be very unhealthy while doing so.
If everyone had an apple watch, fitbit, etc that told you your blood sugar levels, with an immediate effect you could usher in a hugely effective treatment and prevention of diabetes and obesity. Assuming you can get people to wear it and you don't have to prick their fingers.