A recent study published in Neurology has discovered that both high and low levels of HDL cholesterol, often referred to as “good” cholesterol, are associated with a slight increase in the risk of developing dementia. The research monitored over 184,000 older adults for 17 years, revealing that extreme HDL levels compared to mid-range levels correlate with greater odds of dementia.
Interestingly, the study did not find a consistent relationship between LDL cholesterol, known as “bad” cholesterol, and dementia risk, except in individuals using statin medications. This suggests a complex interaction between cholesterol levels, medication use, and cognitive decline.
Participants in the study were part of the Kaiser Permanente Northern California health plan and were tracked for dementia development from surveys conducted between 2002 and 2007 until the end of 2020. The research indicated a U-shaped relationship between HDL cholesterol and dementia risk, with the highest HDL levels linked to a 15% higher risk and the lowest levels to a 7% higher risk of developing dementia.
These findings underscore the intricate connections between cholesterol metabolism and brain health, particularly in the context of aging and dementia. However, the study’s authors caution that while the associations are evident, they do not prove a direct causal relationship between HDL cholesterol levels and dementia.
Lead author Erin Ferguson, MPH, emphasizes the need for further research to explore whether these effects are causal and how HDL might be effectively modified to reduce dementia risk. Neurologist Dr. Clifford Segil also highlights the importance of additional studies, particularly focusing on statin use and its potential impact on vascular dementia.
This research contributes to the growing understanding of dementia’s multifaceted risk factors and points towards the need for personalized approaches in managing cholesterol and preventing cognitive decline.
Source: Medical News Today
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