Blood Test May Predict Dementia Risk Through Biological Age

Research published by the Alzheimer’s Association delves into the link between biological age, determined via blood tests, and the risk of developing dementia. Conducted in the U.K., the study analyzed data from the UK Biobank, involving over 223,000 participants. It focused on blood metabolites related to fat processing, inflammation, and energy use.

According to health records, nearly 4,000 participants developed dementia during the study’s follow-up period.

MileAge Delta and Dementia Risk

The researchers introduced a metric called MileAge delta, which is the difference between metabolite-predicted age and actual age. A higher MileAge delta indicates an older blood profile, while a lower delta suggests a younger profile. People with higher MileAge delta and higher genetic risk were found to be at 10 times greater risk of all-cause dementia.

The study revealed that a higher MileAge delta is associated with an increased risk of several types of dementia, including vascular and earlier-onset dementia. Vascular dementia showed the strongest link.

Genetic Factors and Biological Aging

Participants with elevated MileAge delta and the APOE gene, commonly linked to Alzheimer’s, showcased a significantly increased dementia risk. Dr. Julian Mutz, a research fellow at King’s College London, described the genetic risk as ‘striking,’ noting that biological aging markers like MileAge are predictive of vascular dementia.

Dr. Mutz highlighted the importance of understanding additional risk factors beyond genetics. He suggested that factors like metabolomic aging, which can be influenced by lifestyle or clinical intervention, provide a complementary risk source alongside genetics.

Potential for Intervention

Managing cardiovascular risks, staying physically active, and monitoring mental health may help slow biological aging, potentially reducing the risks of dementia and other age-related diseases. Dr. Mutz stated that dementia is not necessarily a consequence of aging and can be delayed by adjusting certain risk factors.

Fox News senior medical analyst Dr. Marc Siegel responded to these findings, emphasizing the importance of focusing on a healthy life span rather than just longevity. He also underscored the role of the APOE gene in dementia risk.

Study Limitations and Future Implications

The study’s observational nature means it cannot definitively prove a causal relationship between older biological age and dementia risk, though it does suggest strong associations. The research faced limitations, including potential health and demographic biases due to the UK Biobank’s participant composition and the singular measurement of blood metabolites.

Researchers stressed the need for further validation of the MileAge biomarker before it can be applied clinically.

Angelica Stabile, a lifestyle reporter for Fox News Digital, contributed to the discussion on these research findings.