Is the noninvasive blood glucose measurement technology mature now?

The technical barrier of noninvasive blood glucose meter is relatively high. At present, noninvasive blood glucose meters on the market generally adopt two technologies. One is metabolic heat integration method, which tests physiological parameters related to human metabolism and basic physiological information of human body, such as body temperature, blood flow velocity and other parameters to calculate blood sugar; The other is photoacoustic technology, which uses laser to obtain the glucose concentration in the whole blood of human finger capillaries. There are few brands using this technology in China, and Nakagawa Xinmai is one of them, and it is said that it has obtained the national patent certificate.