Found a fake one. Blue sister is skim milk powder, which contains lactose and has a light taste. Identification method: 1. First, download MaxigenesAPP from the mobile APP. (just search Maxigenes). 2. After downloading, Maxigenes software will be displayed. 3. After opening the software, click Authentication in the lower right corner. 4. Click on the pattern of the camera according to the prompt on the appraisal page. Shoot and identify genuine and fake products of Maxigenes. 5. After the verification is successful, AuthenticationSuccessful will be displayed, which means it is genuine.