No, it's not a glucose sensor. Extrapolating from the Google research published in Nature a few months ago on how they estimate insulin sensitivity using wearables (and not just BMI, age, etc): https://www.nature.com/articles/s41586-026-10179-2
Insulin sensitivity correlates with obesity, activity, sleep, etc. so it's not impossible that a wearable can give some degree of prediction. I guess it's mostly good motivation to support habits that increase sensitivity (physical activity, low stress).
Insulin sensitivity correlates with obesity, activity, sleep, etc. so it's not impossible that a wearable can give some degree of prediction. I guess it's mostly good motivation to support habits that increase sensitivity (physical activity, low stress).