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TL;DR: In 84 older pet dogs followed over several years, more indoor accidents went along with worse self-control on treat puzzles, while signs of urine infection were rare and not linked to the accidents. It's a hint that house soiling in old dogs may often r…
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TL;DR: Among older adults who walked on their own before breaking a hip, those with dementia or a low blood-based nutrition score a week after surgery were less likely to be walking independently when they left the hospital. The nutrition score alone was only…
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TL;DR: Among Hispanic and Latino adults in the U.S., people with one particular DNA pattern around the APOE gene were more likely to show steep thinking decline over about 7 years. The well-known APOE4 risk version had a weaker link in the same group. Key Find…
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TL;DR: Old mice given nicotine in their drinking water for 3 months had more cells carrying two key markers of brake-like neurons in the hearing part of the brain, reaching young-adult levels. The study did not test hearing, and it is no reason for anyone to t…
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TL;DR: In 792 people with stable multiple sclerosis, a blood marker of nerve damage more often placed them in an older age band than their actual age, compared with 302 people without MS. The gap was larger in people with more disability or progressive MS, but…
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TL;DR: Old female mice given plasmalogens, a fat found in brain cell membranes, 5 days a week for 2 months did better on a memory maze than old mice given water. Their brains also showed more synapses and less inflammation, but this is a mouse study, not a hum…
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TL;DR: A 2026 analysis in Brain, Behavior, & Immunity – Health of 827 middle-aged adults found that profiles combining intestinal-permeability biomarkers with age, cardiometabolic risk, or lifestyle factors were associated with smaller brain volumes and higher…
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TL;DR: A 2026 post-hoc reanalysis in Molecular Psychiatry found that women assigned davunetide in a prior 52-week progressive supranuclear palsy trial had more favorable scores on the 10-item PSP Rating Scale (PSPRS-10), daily-living measures, and several cogn…
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TL;DR: A 2026 preprint in medRxiv found that poor sleep tracked faster biological aging across more than 64,000 adults, but twin and genetic analyses left the causal claim mixed rather than settled. Key Findings 64,000+ adults: Researchers tested sleep and agi…
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TL;DR: A 2026 preprint in medRxiv linked a higher 24-hour urinary sodium-to-potassium ratio with deep white matter lesions on brain MRI in older Japanese adults, with the association appearing to depend more on lower potassium excretion than on sodium alone. K…
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