The U.S. FDA’s effort to compile a guidance for prescription, point-of-care (POC) blood glucose meter (BGM) test systems seems to show that guidances can be as iterative as the devices they govern. The FDA announcement for the Sept. 28, 2020, final guidance said that the differences between the 2020 final and the 2018 draft include “a minor edit” regarding user accessibility and a technical correction for hemoglobin testing concentration, yielding a document that is finally ready for prime time after four tries over six years.