C peptide is a biomarker for beta cell function. In other words, it's a measure of beta cell health and insulin production, and is critical to developing new disease modifying therapies for type 1 Ferroptosis as a therapeutic target in glioblastoma: Mechanisms and emerging strategies: Molecular Therapy Nucleic Acids Glutathione Depletion and Stalwart Anticancer Activity of Metallotherapeutics Inducing Programmed Cell Death: Opening a New Window for Cancer Therapy ACS Omega What Is Glutathione? Health Benefits, Risks, and More Changes in ferrous iron and glutathione promote ferroptosis and frailty in aging Caenorhabditis elegans eLife