Longer Sleep Linked to Kidney Disease Risk in Type 2 Diabetes

THE ARISING · LONGEVITY & HEALTHSPAN SUNDAY, OCTOBER 18, 2026 IN THIS EDITION · LONGEVITY & HEALTHSPAN 1 ACOG Now Recommends Hormone Therapy for Many Women With Hot Flashes 2 Cardiologists Urge Doctors to Prescribe Exercise as Routine Heart Care 3 Fasting and Autophagy in Humans: Summary Calls Link Unproven 4 Gut Supplements May Modestly Improve Cognition in Adults Over 60, Review Finds 5 Higher Ultra-Processed Food Intake Linked to Silent Brain Damage on MRI 6 Higher VO2 Max Linked to Lower Depression and Anxiety Risk in UK Biobank 7 Bonn Lab Study Shows Blood Cells From Older Donors Lose Epigenetic Age in a Dish 8 Longer Sleep Linked to Kidney Disease Risk in Type 2 Diabetes LONGEVITY & HEALTHSPAN · WEEKLY READ · 3 MIN JOURNAL OF THE ENDOCRINE SOCIETY · 2 SOURCES Longer Sleep Linked to Kidney Disease Risk in Type 2 Diabetes Sleeping more is usually treated as a good sign. A new study of people with type 2 diabetes suggests that, for kidney health, longer sleep may be a signal worth noticing. he research is a prospective cohort study, a type of observational study in people. It followed 678 Japanese outpatients with type 2 diabetes for anT average of 6.0 years (give or take 2.7 years). It was published in 2026 in the Journal of the Endocrine Society. Observational studies can find links. They cannot show that one thing causes another. The researchers looked at diabetic nephropathy, also called diabetic kidney disease. This is kidney damage caused by long-term diabetes. They counted either new cases or worsening of existing disease as a single combined outcome. During follow-up, 215 of the 678 participants reached that outcome. The team recorded lifestyle habits at the start, and again at year 2 and/or year 5. They averaged each person's measurements up to the point of the outcome or the end of follow-up. Of all the lifestyle factors they examined, average sleep duration was the only one linked to the outcome, according to the study's abstract. THE ARISING · OCTOBER 18, 2026 PAGE 22 The direction mattered. The authors conclude that longer sleep, but not shorter sleep, was associated with a higher risk. The trend held after adjusting for key lifestyle and diabetes-related factors. The link was stronger in older participants and in those who already had microalbuminuria (small amounts of protein in the urine, an early sign of kidney damage) or reduced kidney function. Only the abstract was available to us. It does not give the sleep-hour categories or the size of the risk, so we cannot report them. The authors do not claim long sleep harms the kidneys. In a statement released by the Endocrine Society, study author Tomoya Mita of Juntendo University in Tokyo said longer sleep "may be a readily observable marker of underlying health vulnerability." He also said people should not read the findings as advice to sleep less, because "we cannot establish a causal relationship." The Endocrine Society release also states that diabetic kidney disease affects about 30% to 40% of people with diabetes. FOR YOU What does this mean for personal health? The study did not test sudden changes in sleep. It looked at average sleep over years. Mita said longer sleep may be a useful clue to identify people with diabetes who may need closer attention to their kidney health. Beyond that, any advice here is our editorial suggestion, not a finding of the study: if someone notices a clear, lasting increase in how long they sleep, it may be worth mentioning to a clinician. It may be most relevant to older adults with diabetes and to people whose kidney tests already show early changes. Readers should not change their sleep habits or diabetes care without talking to their clinician. There are limits. All participants were Japanese outpatients with type 2 diabetes, so the results may not apply to other groups. The abstract does not say whether other health conditions could explain the pattern. The weakest point of the argument is that we cannot tell from the abstract what sleep lengths counted as long, or how large the risk was. This differs from the REM sleep study we covered on October 6, which tracked sleep stages and disease risk in nearly 96,000 UK adults. That was a different study with a different design. This one adds that sleep length alone may carry information in a specific group, though both are observational. THE ARISING · OCTOBER 18, 2026 PAGE 23 Next, watch for studies that measure sleep objectively and track changes over time. They could show whether longer sleep helps flag kidney risk in routine diabetes care. Sources: Journal of the Endocrine Society (2026), Endocrine Society / Journal of the Endocrine Society (via Newswise) THE ARISING · OCTOBER 18, 2026 PAGE 24