Yes—one woman's kidney estimates moved closer together after treatment for an overactive thyroid. The report followed a 70-year-old woman with long-term kidney disease. She also had an overactive thyroid and Sjögren's syndrome, a condition where the immune system attacks healthy tissue. Her kidney estimates based on Cystatin C and Creatinine differed widely. Both blood markers help estimate how well the kidneys filter blood. That estimate is called eGFR (Estimated GFR). A small kidney tissue sample showed long-term inflammation around the kidney's tiny tubes. Methimazole, a medicine that lowers thyroid hormone production, improved her thyroid function. After treatment, the gap between her two kidney estimates narrowed. The source summary does not give the starting values or the gap's size. Steroid medicines, which reduce inflammation, also helped. Protein in her urine and signs of damage to kidney tubes improved. Correcting dehydration and improving nutrition may have helped too. These changes make it hard to separate each treatment's effect. This is one person's case, not proof of what happens for everyone. Still, it shows why thyroid health matters when reading kidney results. Two estimates can tell different stories, and changes may reflect more than kidney health alone. For BioSocial members, this adds useful context to a bloodwork timeline. Comparing both estimates alongside thyroid changes and treatment dates could make patterns easier to discuss. Community notes are more useful when they include that context, rather than a single result alone. What have you noticed about your kidney estimates during changes in thyroid health?