Used in molecular and cell biology research, particularly in studies on the function of protein phosphatase 2B (calcineurin), which plays an important role in cellular signaling pathways. Cyclosporin C inhibits calcineurin activity, similar to Cyclosporin A, but with weaker immunosuppressive effects, making it a preferred tool for comparative studies on the mechanisms of calcineurin inhibitors in biological systems. It also exhibits antifungal properties and has been investigated for mitochondrial protection, with potential applications in neurodegenerative conditions involving cellular stress. Preliminary studies have explored its antiviral potential against certain viruses that rely on calcineurin for replication.