Quality glucose information is a core prerequisite for successful diabetes management. It enables professionals and people with diabetes to make medically relevant decisions on therapy. Details of glucose profile information beyond HbA 1c have been largely derived from self-monitoring of blood glucose (SMBG). Given the evidence base demonstrating the benefits of SMBG, its routine use is recommended for diabetes management and therapy by many international and regional guidelines (1-3). Today, SMBG is considered an important aspect of the management of glycemic control (3,4). Glucose information of high quality, considering the products used and the processes conducted, is also needed in clinical research in order to gain new evidence and insights on effective treatment strategies in diabetes. SMBG is widely and routinely applied in large clinical trials, where it is used to understand the glycemic state, to enhance awareness of the effects of lifestyle modification and the adaptation of treatment including insulin titration, and to enable documentation of intraday pre-and postprandial glucose excursions (glycemic variability) and the subsequent statistical analysis of this and the confirmation of hypoglycemic episodes. Examples of recent studies that used SMBG are Outcome Reduction With Initial Glargine Intervention (ORIGIN) trial, Action to Control Cardiovascular Risk in Diabetes (ACCORD), and, from earlier times, the Diabetes Control and Complications Trial (DCCT) (5-8). Indeed, SMBG is now applied in most studies of glucoselowering agents, including glucagon-like peptide 1 (GLP-1) receptor agonist and sodium-glucose cotransporter 2 (SGLT2) inhibitor studies.Reliable glucose information requires a clear definition as part of the study design and protocol, not least to ensure replication of the methodology. Interpretation and comparison of study results may be affected if SMBG methods and results are addressed inconsistently. With regard to the interpretation of outcomes of studies, reporting of SMBG in publications should be of the highest qualitydaccurate, precise, reliable, and reproducible. In many publications, however, relevant details of the SMBG measures are lacking or are incomplete. Therefore, the interpretation of study results may be hampered, reliability of study results may be compromised, and repetition of trials may become necessary.This consensus publication not only aims to summarize learnings from previous clinical studies about the use and reporting of SMBG but also proposes recommendations for the description of the performance and reporting of SMBG in future clinical study protocols and related publications.Clinical trials aim at expanding knowledge and evidence. One major principle of Good Clinical Practice is to conduct clinical studies at a quality standard that provides the highest level of safety for the study participants but also avoids a potentially unnecessary burden on participants by inefficient repetition of the experiments with "human beings" to answer a clinical/scientific qu...