Garmin has triumphantly secured a patent for its innovative non-invasive blood glucose monitoring technology. This groundbreaking method leverages pulse spectroscopy, employing near-infrared light to penetrate the skin and scrutinize alterations in light absorption and reflection. Central to this technology is the estimation of glycated hemoglobin (HbA1c) levels, which provide insights into a user's long-term metabolic health. By intricately analyzing hemoglobin concentration through multi-wavelength PPG signals, this technology is poised to revolutionize wrist-worn devices, empowering users with real-time diabetes risk monitoring.