In one of the largest genetic studies ever conducted, researchers from the University of Bristol and University of Copenhagen discovered that specific genetic variations that naturally lower cholesterol are linked to a reduced risk of dementia.

Led by Dr. Liv Tybjaerg Nordestgaard, the research analyzed data from more than one million participants across Denmark, England, and Finland — marking a milestone in understanding the relationship between cholesterol metabolism and brain health.

Genetics and Cholesterol-Lowering Drugs

Some individuals are born with genetic variants that affect the same proteins targeted by cholesterol-lowering medications such as statins and ezetimibe. These genetic factors help maintain low cholesterol levels, which may offer long-term protection against dementia.

To assess this connection, the team used a genetic analysis method known as Mendelian Randomization, allowing them to simulate the effects of cholesterol-lowering drugs while minimizing the influence of external factors like diet or lifestyle.

Study Findings

The findings revealed that lowering blood cholesterol by 1 mmol/L was associated with up to an 80% reduction in dementia risk when certain genetic variants were present.

According to Dr. Nordestgaard:

“Our study suggests that individuals with naturally lower cholesterol due to genetic factors have a substantially lower risk of developing dementia.”

These results highlight that maintaining healthy cholesterol levels, whether genetically or medically, may play a key role in preventing age-related cognitive disorders such as dementia and Alzheimer’s disease.

However, researchers cautioned that the study does not provide definitive proof that cholesterol-lowering medications directly prevent dementia but emphasizes the importance of cholesterol management for brain health.

Health Tip:

Adopting a heart-healthy diet rich in fruits, vegetables, and fiber, along with regular physical activity, can help maintain healthy cholesterol levels and support cognitive function