Core Viewpoint - The ongoing dispute regarding the detection methods for recombinant collagen in cosmetics has raised significant concerns about the reliability of testing methods used by the company, Juzhi Biotechnology, and the implications for consumer trust [1][4]. Group 1: Detection Methods - Juzhi Biotechnology referenced the "Detection Methods for Recombinant Collagen Content" from the Chinese medical industry standard YY/T 1947-2025, which includes two main types of detection methods [1][2]. - The first method is the "mass spectrometry method," which is primarily used for tissue regeneration materials and is not suitable for complex cosmetic formulations due to potential interference from other ingredients [2][3]. - The second method includes six techniques, with the Kjeldahl method being the most likely choice for Juzhi Biotechnology, despite its limitations in accurately assessing specific proteins in complex formulations [2][3]. Group 2: Product Withdrawal and Consumer Trust - Juzhi Biotechnology's product, Human-Like Recombinant Collagen Essence, has been removed from major sales channels, raising questions about the company's testing results [4]. - The claim that testing for recombinant collagen content requires raw materials from Juzhi is misleading, as the product itself can be purchased for independent testing [4][5]. - The company's practice of not selling raw materials externally may pose risks, as it limits independent verification and peer review of their recombinant collagen [4][5]. Group 3: Questions and Concerns - There are significant concerns regarding the independence of any future sample testing if Juzhi Biotechnology provides the samples themselves, as this could lead to questions about the integrity of the results [5]. - Two critical questions remain unanswered by Juzhi Biotechnology: the absence of the core amino acid glycine in the tests and the potential misrepresentation of dipeptides as "mini collagen" [5].
巨子生物被质疑从不对外销售原料：同行很难对其重组胶原原料独立验证