The U.S. Food and Drug Administration has posted warning letters to five companies who produce products labeled as homeopathic for significant violations of current good manufacturing practice (CGMP) regulations. Four of the warning letters pertain to companies who jointly produced a product labeled as homeopathic that posed a significant safety risk to consumers because their purportedly sterile products were not shown to be sterile. An additional letter outlines a company’s failure to have systems in place to assure proper design, monitoring, and control of manufacturing processes.