The Surprising Connection Between Alzheimers and Cholesterol


Senior Care Authority

Posted on

Sep 06, 2023


Florida - Southwest

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September is National Cholesterol Education Month and at Senior Care Authority we are especially interested in cholesterol because of its emerging connection to Alzheimer’s. In the health and wellness world, cholesterol has long been a topic of concern due to its association with cardiovascular diseases. However, recent research has unveiled a fascinating and complex connection between cholesterol and another formidable adversary: Alzheimer's disease. Because of our ongoing work providing support to our clients who have a loved one with Alzheimer’s or who have Alzheimer’s themselves, we want you to be aware of the intricate interplay between cholesterol and Alzheimer's. We will highlight findings from peer-reviewed research and offer valuable tips on how lowering your cholesterol may reap cognitive benefits.


Cholesterol and Brain Health: Beyond the Stereotype

Cholesterol is often unfairly vilified as a health villain, but it serves essential functions in the body. Beyond its role in maintaining cell membranes and hormone production, cholesterol plays a critical role in brain health. Nerve cells in the brain require cholesterol to build and maintain their cell membranes, ensuring efficient communication between neurons. Furthermore, cholesterol is vital for the formation of synapses, the microscopic connections that facilitate neural signaling. Cholesterol is also involved in the function of neurotransmitter receptors in the cell membrane. These receptors are essential for receiving and processing neurotransmitter signals, which play a critical role in various brain functions, including mood regulation and cognition.


The Amyloid Beta Puzzle

A hallmark of Alzheimer's disease is the accumulation of amyloid beta plaques in the brain, contributing to neurodegeneration and cognitive decline. Emerging research suggests that cholesterol metabolism may influence the production and clearance of amyloid beta. A study published in the Journal of Alzheimer's Disease (doi: 10.3233/JAD-170838) indicates that cholesterol levels impact the activity of enzymes involved in amyloid beta production. High levels of low-density lipoprotein (LDL) cholesterol, commonly referred to as "bad" cholesterol, could potentially exacerbate the buildup of amyloid beta plaques, a pivotal step in Alzheimer's progression.


The Blood-Brain Barrier and Beyond

The blood-brain barrier is a protective shield that regulates the passage of molecules from the bloodstream into the brain. Cholesterol plays a crucial role in maintaining the integrity of this barrier. However, disruptions in the blood-brain barrier have been implicated in neurodegenerative processes, including Alzheimer's disease. Elevated cholesterol levels may compromise the blood-brain barrier, permitting harmful molecules to enter the brain and trigger inflammation and neuronal damage.


The APOE Gene Connection

The apolipoprotein E (APOE) gene, which influences cholesterol transport and metabolism, has gained significant attention in Alzheimer's research. Notably, the APOE ε4 allele is associated with a heightened risk of Alzheimer's disease. A peer-reviewed study published in JAMA Neurology (doi:10.1001/jamaneurol.2013.607) found that individuals carrying the APOE ε4 allele exhibited higher cholesterol levels and an increased susceptibility to Alzheimer's. This gene variant not only influences cholesterol but also affects the metabolism of amyloid beta, contributing to disease progression.




Strategies to Lower Cholesterol for Cognitive Well-Being

The evolving understanding of the cholesterol-Alzheimer's link highlights the importance of managing cholesterol levels for potential cognitive benefits. We know you have heard a lot of this before, but remember, your goal is to have healthy levels of cholesterol to improve your cognitive function. Here are practical tips to help lower cholesterol:


      Healthy Diet: Adopt a diet rich in fruits, vegetables, whole grains, lean proteins, and healthy fats. Reduce saturated and trans fats, often found in fried and processed foods.


      Physical Activity: Engage in regular aerobic exercises such as walking, jogging, swimming, or cycling. Exercise helps increase high-density lipoprotein (HDL) cholesterol ("good" cholesterol) and supports overall cardiovascular health.


      Quit Smoking: Smoking is detrimental to both cardiovascular health and brain function.  Quitting smoking can improve cholesterol levels and promote overall well-being.


      Medication Management: In some cases, lifestyle modifications may not be sufficient to lower cholesterol. Consult a healthcare professional to determine if cholesterol-lowering medications, such as statins, are appropriate.


The intricate connection between cholesterol and Alzheimer's disease reveals a multifaceted relationship that extends beyond cardiovascular health. While ongoing research strives to unveil the exact mechanisms at play, there is growing evidence suggesting that managing cholesterol levels has cognitive benefits.


If you or someone you know are interested in learning more about Alzheimer’s or how to prepare for the future care of someone with Alzheimer’s, we are here to help. Our advisors have supported our own loved ones with Alzheimer’s or dementia and we know how hard it is. Planning as early as possible is as critical as keeping cholesterol levels in optimal ranges. We can be your trusted Alzheimer's resource. (239) 330-2133 or 

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Senior Care Authority

Transition Specialists 8805 Tamiami Trail N, Naples, Florida, 34108

We know that navigating senior care options can be overwhelming for you and your family. As your advocate, we can do the homework for you.Well help you sort through and understand all your care options, traverse a complex healthcare system, get accurate and up-to-date information, and connect you to vetted local resources. How can we help you make the best choices for your loved one?