Can Metabolic Syndrome Make Your Brain Age Faster?

Is metabolic syndrome affecting more than your heart? Researchers say it may also accelerate brain aging.

One in four adults worldwide is living with metabolic syndrome, a cluster of conditions best known for increasing the risk of type 2 diabetes and heart disease. Now, new research suggests its effects may extend beyond the heart and metabolism, potentially accelerating brain aging and increasing the risk of cognitive decline (1^✔ ✔Trusted Source
Metabolic syndrome is associated with accelerated brain aging

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Metabolic syndrome is diagnosed when a person has at least three of five risk factors: high blood sugar, high blood pressure, excess abdominal fat, low levels of HDL (“good”) cholesterol, and high triglycerides. While each of these conditions poses health risks on its own, together they have a much greater impact on overall health.

Researchers have previously linked metabolic syndrome to neurological conditions such as stroke, dementia, and Parkinson’s disease. However, little was known about how the condition affects the brain itself. To investigate this, researchers analyzed data from 27,375 adults aged 40 to 70 enrolled in the UK Biobank, a long-term health research project.

Brains Appeared Older Than Their Actual Age

The researchers focused on a measure known as the brain-age gap, which compares a person’s actual age with the biological age of their brain. Using artificial intelligence and more than 1,000 brain MRI imaging markers, they trained a machine learning model to identify patterns of healthy brain aging before applying it to the broader study population.

The findings revealed a clear trend. People with metabolic syndrome had brains that appeared older than expected for their chronological age. The greater the number of metabolic syndrome components a person had, the larger the difference between their actual age and brain age.

On average, people with three metabolic syndrome components had brains that looked about one year older than their actual age. This increased to 1.7 years in people with four components and 2.3 years among those with all five. Researchers also found that each individual component of metabolic syndrome was independently associated with an older-looking brain.

Although a difference of one or two years may seem small, researchers say it represents a meaningful departure from healthy brain aging and could increase the risk of future cognitive decline and dementia.

What Could Be Driving Faster Brain Aging?

The researchers also examined blood samples collected from participants to understand why metabolic syndrome may affect the brain. They identified three biological markers that appeared to partially explain the link between metabolic syndrome and accelerated brain aging.

One of these markers was GlycA, an indicator of chronic, low-grade inflammation. Higher levels of inflammation may damage blood vessels, promote the buildup of harmful proteins in the brain, and contribute to the loss of brain cells over time.

The study also identified the ApoB-to-ApoA1 ratio, a marker associated with atherosclerosis, or the narrowing and hardening of blood vessels. Reduced blood flow caused by atherosclerosis may limit the supply of oxygen and nutrients needed to keep brain tissue healthy.

In addition, researchers found that levels of fatty acids, including omega-6 and other polyunsaturated fats, were linked to brain aging. These fats play an essential role in maintaining the structure and function of brain cells, suggesting that changes in fat metabolism could also contribute to declining brain health.

Lifestyle Changes May Help Protect the Brain

Despite the findings, researchers emphasize that metabolic syndrome is largely preventable and manageable. All five components of the syndrome can be improved through healthy lifestyle changes.

Regular physical activity, a balanced diet rich in fruits, vegetables, whole grains, and lean proteins, maintaining a healthy weight, getting adequate sleep, and routine medical check-ups can help control blood pressure, blood sugar, cholesterol, and abdominal obesity.

Importantly, the study found that every additional metabolic syndrome component was associated with a progressively older-looking brain. This suggests that improving even one risk factor may help slow brain aging and reduce the risk of future cognitive decline.

More Than Heart Health

The researchers say the findings highlight the importance of viewing metabolic syndrome as more than a risk factor for diabetes and cardiovascular disease. It may also have significant consequences for brain health.

While further research is needed to confirm exactly how these biological changes contribute to accelerated brain aging, the study suggests that managing metabolic syndrome could play an important role in preserving cognitive function as people age. Keeping blood pressure, blood sugar, body weight, and cholesterol under control may not only protect the heart but also help keep the brain healthier for longer.

Reference:

1. Metabolic syndrome is associated with accelerated brain aging – (https://alz-journals.onlinelibrary.wiley.com/doi/10.1002/alz.71563)

Source-Medindia