This smart ring can measure your blood sugar using sweat, no needles required

Researchers at UC San Diego have built a prototype smart ring that analyzes sweat to measure glucose, ketones, vitamin C, uric acid, lactate, and alcohol.

In tests with people with and without type 1 diabetes, its glucose and ketone readings closely matched commercial blood and glucose monitors.

The ring uses an osmotic hydrogel to draw sweat from the skin and sends the data to a smartphone app.

The device still needs further validation, has short battery life, and is bulky in its current form.

If commercialized, it could make glucose monitoring less painful, cheaper, and more convenient while enabling broader health tracking.