The U.S. Food and Drug Administration (FDA) has issued a safety notice warning consumers not to purchase or use smartwatches and smart rings that claim to non - invasively measure blood glucose. These devices have not been proven to be accurate, and using them for blood glucose monitoring can lead to inaccurate insulin, sulfonylurea, or other drug dosages, thus posing risks to patients with diabetes.

Regular blood glucose monitoring is crucial for patients with diabetes. Accurate monitoring technology helps in formulating care plans and can delay or prevent diabetes - related complications.

The FDA emphasizes that currently, any device claiming to measure blood glucose without piercing the skin is inaccurate, and smartwatches or rings themselves do not yet have such monitoring capabilities. Therefore, consumers should be cautious when purchasing and using such devices and report companies that sell smartwatches and rings claiming to measure blood glucose levels.