Could Your Bone Density Tell Us Something About Your Brain Health?

When we think about protecting our brains as we age, we usually focus on things like sleep, exercise, and keeping our minds active. Bone density probably isn’t high on that list.

But new research suggests the health of your bones may have more to do with cognitive aging than previously understood. In a study of older adults, researchers found that lower bone density in the spine was associated with changes in brain structure and faster cognitive decline over time.

The findings raise an interesting possibility: bone health may offer another way to identify people who could be at risk for age-related changes in brain function.

What Researchers Discovered

In a 2026 study published in the journal Radiology, researchers from Johns Hopkins University and other institutions examined data from 715 adults participating in the Multi-Ethnic Study of Atherosclerosis. The participants had a median age of 69 and no clinically recognized cardiovascular disease at the start of the analysis.

Using existing chest CT scans, researchers measured bone mineral density in the thoracic spine, the portion of the backbone that runs through the upper and middle back. They then examined how those measurements related to changes in brain structure and cognitive performance over time.

People with lower spinal bone density tended to experience faster declines in certain measures of cognitive function. Researchers also identified associations with changes in the brain’s white matter, the tissue that helps different regions of the brain communicate.

Not every brain measure showed a statistically robust association, and the study doesn’t establish that losing bone density causes cognitive decline. Still, the findings suggest that spinal bone density could provide useful information about broader aging processes.

What Do Bones Have to Do With the Brain?

Your skeleton does much more than hold you upright. Bone is living tissue that’s constantly being broken down and rebuilt, and its health is influenced by hormones, nutrition, physical activity, and other biological processes.

Researchers are increasingly interested in whether some of those same processes may also influence brain aging.

For example, chronic inflammation, changes in hormone levels, and metabolic health have all been investigated in relation to both skeletal and neurological health. Scientists are also studying whether certain molecules released by bone tissue play a role in communication with other organs.

These are possible explanations for the connection, not mechanisms established by this particular study.

There’s also a practical overlap: several of the habits that help preserve bone density are already associated with healthier cognitive aging.

4 Ways to Support Your Bones as You Age

You don’t need a completely separate wellness routine for every part of your body. Some of the most established strategies for maintaining bone health also support muscle strength, mobility, and other aspects of healthy aging.

1. Make Strength Training a Regular Habit

Walking has plenty of health benefits, but your bones also need activities that place appropriate demands on them.

Resistance training and weight-bearing movement help stimulate bone maintenance while strengthening the muscles that support your joints and balance.

If you’re new to strength training, start with manageable movements such as squats, step-ups, resistance bands, or light weights, and gradually increase the challenge as you get stronger.

2. Get Enough Calcium and Vitamin D

Calcium provides essential building material for bones, while vitamin D helps your body absorb and use it.

Dairy products, calcium-set tofu, fortified plant milks, canned salmon with bones, and certain leafy greens can all contribute to your calcium intake.

Vitamin D can be harder to obtain through food alone, so it’s worth discussing your intake and individual risk factors with your healthcare provider, particularly as you get older. Testing or supplementation may be appropriate in some circumstances, but not everyone needs routine blood testing.

3. Don’t Forget About Protein

Protein gets plenty of attention for muscle maintenance, but it’s important for bones, too.

Bone contains a protein-rich matrix that provides structure and flexibility, and adequate protein intake helps support the muscle mass needed for strength and mobility.

Try including a meaningful protein source at each meal, whether that’s eggs, Greek yogurt, fish, poultry, tofu, lentils, or beans.

4. Know When to Check Your Bone Density

Bone loss can progress for years without obvious symptoms, which is why screening matters.

Women 65 and older are generally advised to undergo osteoporosis screening, while younger postmenopausal women may benefit from earlier screening if they have additional risk factors.

A standard bone density test, called a DXA scan, can help identify osteoporosis and assess fracture risk.

The new research also raises the possibility that existing CT scans could eventually provide additional information about bone density and cognitive health, although this isn’t currently an established screening approach for cognitive decline.

Why Bone Health Deserves More Attention

The findings don’t mean that stronger bones guarantee a healthier brain, or that low bone density predicts dementia. More research is needed to understand the relationship and determine whether bone measurements can meaningfully improve assessments of cognitive risk.

But they offer another reason to take bone health seriously before a fracture or osteoporosis diagnosis brings it to your attention.

Maintaining muscle, staying active, eating enough protein, and meeting your calcium and vitamin D needs are already important parts of healthy aging. And as researchers continue investigating the relationship between our bones and brains, those habits may prove relevant to more than skeletal health alone.