Regular opioid use may increase dementia risk

July 21, 2025

In a study published in Alzheimer’s & Dementia, a team led by Dr. Sha Feng from the Shenzhen Institute of Advanced Technology of the Chinese Academy of Sciences—collaborating with Dr. Jed A. Barash from the Massachusetts Veterans Home at Chelsea and Prof. W. Andrew Kofke from the University of Pennsylvania—has found that regular opioid use is associated with an increased risk of dementia, particularly vascular dementia.

Gut microbes reveal a surprising tie to cortisol spikes during acute stress
The gut microbiome influences numerous physiological processes. Researchers at the University of Vienna have now demonstrated for the first time that, in healthy adults, the diversity of gut bacteria and their capacity to produce certain metabolites are associated with the acute stress response—particularly stress reactivity. Higher microbial diversity was associated with stronger hormonal and subjectively perceived stress reactivity. The results suggest that the gut microbiome may play a role in regulating the acute stress response. The study was published in Neurobiology of Stress.
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The subtle science behind safer brain implants
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Menstrual cycle reshapes nearly 200 blood proteins, offering a broader view of women's health
It is a process as old as humanity itself, yet there is still much we do not know about women's menstrual cycle and the impact it has on the entire body. Now, a team of researchers from the Department of Clinical Medicine at Aarhus University has, for the first time, demonstrated that the cycle affects a wide range of proteins in the female body, explains Associate Professor Jonas Ghouse, one of the researchers behind the study. The study is published in the journal Nature Medicine.
New research challenges 4-decades old obesity theory as to why and how body composition varies in young children
In new research being presented at the European Congress on Obesity in Istanbul, Turkey (12–15 May) and published in The Journal of Nutrition, a 42-year-old theory as to why children's body mass index (BMI) decreases post-infancy before then rising continuously from age 6 years—"the adiposity rebound"—is refuted using new analyses—rather than decreasing body fat, the real reason is proposed as increasing muscle mass.

Regular opioid use may increase dementia risk

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