Core Viewpoint - The controversy surrounding the authenticity of collagen content in a product by Juzhi Biotechnology has sparked significant discussion, particularly regarding the testing methods used to measure collagen levels [1][2]. Group 1: Testing Methods and Controversy - The testing method used by Juzhi Biotechnology, known as the Biuret method, has been questioned for its reliability in complex cosmetic formulations, as it may yield inflated results due to interference from other ingredients [5][7]. - A blogger has raised concerns that the Biuret method cannot accurately distinguish between collagen and other peptide components, such as sodium polyglutamate, which could lead to misleading results [5][6]. - The blogger also highlighted discrepancies between the product versions sent for testing by Juzhi Biotechnology and their own submissions, indicating potential inconsistencies in the testing process [6]. Group 2: Regulatory Attention and Market Impact - The controversy has attracted regulatory scrutiny, with local market supervision authorities acknowledging the issue and beginning investigations [9][10]. - Following the controversy, the 1.0 version of the product has reportedly been removed from major e-commerce platforms, while the 2.0 version remains available for sale [10].