What are these wearable devices called?

Continuous glucose monitors are the wearable sensors that read blood sugar levels from the fluid just beneath the skin every few minutes, sending readings straight to a phone so users can see minute-by-minute trends without the repeated finger pricks that older testing methods required.

Pulse oximeters clip onto a finger to measure blood oxygen levels, an entirely different vital sign unrelated to blood sugar. Insulin pumps deliver insulin into the body rather than measuring anything, they're a treatment device, not a monitoring sensor.

Once used almost exclusively by people with diabetes, these sensors are now increasingly marketed directly to the general public for wellness tracking, letting anyone see in real time how specific foods or activities affect their own blood sugar patterns.