The number that showed up in almost every story this week: roughly 30% of peptide products fail quality testing. Vanity Fair cited it. Science News referenced it. It's become the go to statistic Figure 4 from Study of pH dependent solubility of organic bases. Revisit of Henderson Hasselbalch relationship. Semantic Scholar The pH Dependence of Niclosamide Solubility, Dissolution, and Morphology Motivates Potentially Universal Mucin Penetrating Nasal and Throat Sprays for COVID19, its Contagious Variants, and Other Respiratory Viral Infections bioRxiv pKa critical Interpretations of SolubilitypH Profiles: PG 300995 and NSC 639829 Case Studies