This review examines a group of rare fungal compounds called incisterols, with a focus on demethylincisterol A3 (DM-A3), which has shown promise as an anticancer agent. DM-A3 works through multiple mechanisms including blocking cancer cell signaling pathways, inhibiting specific enzymes, and reducing inflammation. The compound has demonstrated effectiveness against various cancer types in laboratory studies and showed tumor-reducing effects in animal models, suggesting potential for future cancer therapy development.