Poor sleep was linked to less steady day-to-day blood sugar in 137 adults with type 2 diabetes. The people in the study filled out a sleep quality questionnaire. They also wore glucose sensors for 14 days, without seeing the readings. Overall, 69% reported poor sleep. Researchers compared their sleep reports with several measures of blood sugar patterns. Poor sleep was linked to more time above the target blood sugar range. It was also linked to lower Glucose Time-In-Range (CGM), meaning less time within that range. Both patterns appeared during the day and at night. People reporting poorer sleep also had bigger differences between days and higher scores for high blood sugar risk. The links remained after researchers accounted for age, sex, and other health factors. For our Glucose Variability (CV%) community, one distinction matters. The reported finding concerned changes from one day to another. The source does not give a specific change in this community's percentage measure. It also does not give the extra minutes spent above range. This was a link, not proof that poor sleep caused the changes. The study did not test whether improving sleep made blood sugar steadier. Its findings also apply to adults with type 2 diabetes, not necessarily everyone. For members tracking their own numbers, sleep notes could add useful context. Comparing several days of readings may reveal patterns worth discussing together. Sharing the tracking window alongside the numbers can make those community comparisons clearer. What patterns have you noticed between your sleep quality and blood sugar readings across days?