Is there a benefit for healthy people to track their blood sugar? 

Measuring blood sugar has joined sleep and exercise tracking as wellness trends, with some longevity experts claiming that reducing fluctuations throughout the day can help protect against heart disease, even for people who don’t have diabetes.

Continuous glucose monitors, or CGMs, are small devices that track blood sugar in real time and can tell wearers how their bodies are reacting to stress, food, sleep or exercise. New…