Bone density and memory: is there a link?
Quick answer
A new study of 715 participants found that lower spinal bone density, measured by AI from existing chest computed tomography (CT) scans, was associated with faster cognitive decline. This does not mean low bone density causes dementia. The changes were modest, and the study cannot predict an individual’s future. The researchers suggest bone and brain health may share underlying processes.
We usually think about bone density in terms of fracture risk, and memory in terms of brain health. A new study suggests the two may deserve a closer look together.
Researchers used AI to measure spinal bone density from existing chest CT scans, then compared the results with later brain scans and cognitive tests. Among 715 participants, lower bone density was associated with faster cognitive decline. In smaller groups with repeat magnetic resonance imaging (MRI) scans, it was also linked to changes in white matter, the pathways that help different parts of the brain communicate. (pubs.rsna.org)
This does not mean that low bone density causes dementia. The changes observed across the group were modest, and the study cannot predict an individual’s future. The more interesting possibility is that bone and brain health may reflect some of the same underlying processes. The researchers point to factors such as insulin resistance, blood lipids and menopausal change as possible shared influences. (www.rsna.org)
That is what makes this research so relevant to CogMission. If someone comes to us concerned about memory, their bone health may add a useful piece to the picture. Equally, a finding of osteopenia may be a prompt to look more broadly at metabolic and cardiovascular health, especially if they have noticed changes in their thinking.
There is a practical possibility here too: the researchers extracted bone density information from scans people had already undergone. In time, existing images might help identify people who would benefit from a fuller health assessment, without another scan. That approach still needs further study and is not a dementia screening test. (www.rsna.org)
For now, the message is simple: a bone density result tells us something important about bones. It may also be an invitation to ask better questions about the health of the whole person.
Source: Momtazmanesh S, et al. Radiology, 22 September 2026. Read the study. (pubs.rsna.org)
Common questions
Can low bone density affect memory?
In the study, lower bone density was associated with faster cognitive decline among 715 participants. In smaller groups with repeat MRI scans, it was also linked to white matter changes. This is an association only. It does not mean low bone density causes dementia.
Is osteopenia a sign of dementia?
The study does not say that. We suggest a finding of osteopenia may be a prompt to look more broadly at metabolic and cardiovascular health, especially if someone has noticed changes in their thinking. The study cannot predict an individual’s future.
Why might bone health and brain health be connected?
The researchers suggest bone and brain health may reflect some of the same underlying processes. They point to insulin resistance, blood lipids and menopausal change as possible shared influences. This is a possibility rather than something the study has proven.
This article is for general information and isn’t a substitute for personal medical advice. Please speak to your GP (family doctor) or a qualified practitioner before making changes to medication or treatment.