SouthernWorldwide.com – Your biological age, as determined by a blood test, may serve as an indicator for your risk of developing dementia.
Recent research, published by the Alzheimer’s Association, has investigated the connection between an individual’s biological age and their overall risk of developing dementia.
This study, conducted by UK-based researchers, analyzed data from over 223,000 participants within the UK Biobank. The analysis focused on measuring blood metabolites, which are small molecules associated with fat processing, inflammation, and energy utilization.
Health records indicated that approximately 4,000 of these participants were diagnosed with dementia during the follow-up period.
The researchers developed a metric called the MileAge delta. This is calculated by subtracting a person’s actual age from their metabolite-predicted age. A higher MileAge delta signifies that an individual’s blood profile appears older than their chronological age, while a lower MileAge delta suggests a profile that appears younger.
The findings revealed a correlation between a higher MileAge delta and an increased risk of all-cause dementia, vascular dementia, earlier-onset dementia, and unspecified dementia. The strongest link was observed for vascular dementia.
Notably, individuals who exhibited both a higher MileAge delta and carried the APOE gene, which is associated with Alzheimer’s disease, demonstrated a tenfold greater risk of developing all-cause dementia.
Dr. Julian Mutz, a co-author of the study and a research fellow at the Social, Genetic & Developmental Psychiatry Centre at King’s College London, described this amplified genetic risk as “striking.”
He emphasized the importance of understanding risk factors beyond genetics.
“While tenfold is a very large increase, it reflects the combination of a powerful genetic risk factor with an indicator of biological aging,” Dr. Mutz stated.
“The important point is that these two sources of risk are complementary, and unlike genetic risk, metabolomic aging (biological aging measured through metabolites) is potentially modifiable through lifestyle or clinical intervention.”
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Dr. Mutz suggested that managing cardiovascular risk factors, maintaining physical activity, and monitoring mental health could contribute to slowing biological aging, thereby potentially reducing the risk of dementia and other age-related conditions.
“Dementia is not an inevitable consequence of aging,” Dr. Mutz pointed out. “It can potentially be delayed or prevented by modifying risk factors, including biological aging.”
Another expert reiterated the role of the APOE gene in provoking dementia, particularly Alzheimer’s.
This research also indicates that chronic illness, when combined with the APOE gene, elevates the likelihood of developing dementia. For instance, there is a 60% increased risk of vascular dementia when poor health is present alongside this gene.
Vascular dementia is known to be associated with conditions such as heart disease, high blood pressure, and obesity.
The researchers did acknowledge certain limitations within their study. As an observational study, it could not definitively establish a causal relationship between older biological age and a higher dementia risk, but rather suggested an association.
Furthermore, the reliance on data from the UK Biobank meant the participants were generally healthier and predominantly of European descent, which may limit the generalizability of the findings to the broader population.
The study also utilized a single blood measurement, preventing the tracking of changes in biological aging over time.
Regarding dementia diagnoses, the researchers noted that lifestyle behaviors and health factors could have influenced the observed outcomes.
The research team stressed that the MileAge biomarker requires further validation before it can be considered for use in clinical settings.
