New technology brings blood glucose measurement closer to the Apple Watch.

Breathing could become the key to glucose monitoring.

Apple has long sought non-invasive wrist-based glucose measurement.

More than a decade later, this feature remains a dream. But a new device could bring about the breakthrough.

Why blood sugar monitoring is so important

More than ten percent of adults worldwide have diabetes, and almost half are unaware of it. Early detection saves lives, but current measuring devices require a small skin prick.

Because only high-risk patients endure regular monitoring, a painless solution integrated into a mass-market device like the Apple Watch could reach millions who currently go undiagnosed.

Breath analysis instead of a needle prick

A promising method measures breath acetone, a marker of diabetes. Start-up Prevent developed "Isaac," a coin-sized pendant that analyzes volatile compounds.

This test, which requires only a simple exhale, takes just seconds—potentially making daily monitoring more convenient.

To assess real-world effectiveness, clinical trials for this technology are already in progress.

Indiana University is testing Isaac on adolescents with type 1 and adults with type 2 diabetes.

If successful, FDA approval could be possible by 2026. While continuous readings aren’t available, this technology still supports daily checks.

Apple Watch could benefit.

Yet, miniaturization remains the biggest challenge, as Isaac's current size is nearly equal to that of the Apple Watch.

If Isaac receives FDA approval, however, it would signal feasibility and potentially move Apple closer to realizing its vision.

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