Rest assured! This CGM was used to measure the sugar content of food before. Because I am a slimming blogger, I need to control my sugar intake, so I bought one to monitor it. I once bought a cup of sugar-free milk tea, and my blood sugar changed soon after drinking it. I specially measured the fingertip blood, and the blood sugar did rise. The two results are similar. The little brother who sells milk tea lied. I might as well learn more from Baidu for details.