New Study Shows Shingles Vaccine May Slow or Protect Against Dementia
Facebook-f X-twitter Youtube Table of Contents The Shingles Vaccine: An Unexpected Ally Against Dementia? If you’ve been putting off the shingles vaccine, there’s a powerful
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The Shingles Vaccine: An Unexpected Ally Against Dementia?
If you’ve been putting off the shingles vaccine, there’s a powerful new reason to reconsider, and it has nothing to do with avoiding a painful rash. Emerging research suggests the shingles vaccine may help protect your brain.
A newly published study found that people who received the shingles vaccine had a lower risk of developing dementia. Even more striking, among those already diagnosed, vaccination was associated with slower disease progression and reduced mortality. These findings add to a growing body of research pointing to the shingles vaccine as a surprising new ally in the fight against cognitive decline.
This new discovery matters more than ever. Recent data estimates that the lifetime dementia risk may climb as high as 42 percent after age 55, making prevention and brain protection urgent priorities. Scientists are increasingly looking for answers beyond the brain itself and toward the immune system.
Shingles is caused by the reactivation of the varicella-zoster virus, the same virus responsible for chickenpox earlier in life. Researchers have discovered that certain herpes viruses can affect the nervous system, triggering inflammation that may contribute to memory loss and neurodegeneration. Indeed, growing evidence suggests that brain health is strongly linked with immune resilience and infection control.
In this blog, we’ll unpack the latest science linking shingles and dementia, explore how the shingles vaccines may play a protective role in brain health, and share practical steps you can take now to help safeguard your memory as you age.
Related: 12 Ways to Dodge Dementia
Dementia often develops silently over many years. By the time noticeable memory loss or confusion appears, significant damage has already occurred in the brain.
Why Dementia Prevention Matters Now More Than Ever
Dementia is an umbrella term used to describe a group of symptoms that affect thinking, memory, and the ability to function in daily life. As the condition develops, individuals may experience any of the following common symptoms of dementia:
- Memory loss that disrupts daily life (forgetting recent events; repeating questions)
- Challenges with thinking, problem-solving, language (finding words)
- Difficulty with complex tasks
- Visual/spatial issues (judging distance)
- Mood/personality changes
- Disorientation (time/place)
- Problems with judgment or planning
- Social withdrawal
Alzheimer’s disease, the most common form of dementia, accounts for an estimated 60 to 80 percent of all cases. It is characterized by the buildup of abnormal proteins in the brain that damage neurons and disrupt communication between brain cells, gradually impairing cognitive function.
According to the Centers for Disease Control and Prevention (CDC), close to 7 million older adults in the United States are currently living with Alzheimer’s disease, and that number is expected to double by 2060. As these rates continue to rise, protecting brain health has never been more critical.
One of the greatest challenges with dementia is that it often develops silently over many years. By the time noticeable memory loss or confusion appears, significant damage has already occurred in the brain.
This is why preventive strategies, including emerging research on the shingles vaccine and dementia risk, are gaining so much attention today.
What Causes Shingles, and How Does It Affect Your Brain?
Shingles is a painful viral infection caused by the reactivation of the varicella-zoster virus, the same virus responsible for chickenpox in childhood. While chickenpox typically affects children and young adults, shingles (also known as herpes zoster) most often occurs later in life, after the virus has been lying dormant for years.
Indeed, after a person recovers from chickenpox, the virus does not leave the body. Instead, it remains inactive in nerve cells, particularly in the dorsal root ganglia located near the spinal cord.
The virus can reactivate years or even decades later, often when the immune system is weakened by aging, illness. It travels along nerve pathways to the skin, causing early symptoms such as burning, tingling, or sharp nerve pain. This is followed by the characteristic painful, blistering rash, which usually appears on one side of the body.
Importantly, shingles doesn’t just affect the skin. The infection triggers a powerful immune response that can lead to widespread inflammation throughout the body, including the brain.
This neuroinflammation can damage neurons and the glial cells that support communication between nerve cells. When these brain cells are compromised, the risk of cognitive decline and neurodegenerative conditions increases.
In fact, research has consistently identified systemic inflammation, and the neuroinflammation it drives, as a key contributor to the development of dementia.
The prevention of shingles with the vaccine appears to do far more than reducing the risk of developing the painful rash. When you are able to reduce the risk of viral reactivation and control inflammation, you safeguard your neurons and slow the progress of the cognitive changes that are age-related.
What Groundbreaking Studies Reveal About the Shingles Vaccine and Dementia
A remarkable study led by Stanford researchers and first published in Nature in April 2025, found that among older Welsh adults, those who received the shingles vaccine were 20 percent less likely to develop dementia over the next seven years than those who did not receive the vaccine.
The findings support the emerging theory that viruses that impact the nervous system can increase the risk of dementia.
A follow-up study, published in Cell in December 2025, found that the vaccine may also benefit individuals already diagnosed with dementia by slowing the progression of the disease.
Overall, the findings of the studies suggest that preventing shingles and the inflammation and immune stress it causes can help protect the brain cells and preserve memory and cognition.
These findings are promising, but not definitive.
The shingles vaccine can also support your immune system as you age. When you have a well-regulated immune system, it is better able to protect your brain without causing any overreaction. That can help in limiting inflammation-related brain damage that is linked to Alzheimer’s disease and other forms of dementia.
Reducing preventable infections is one practical way of protecting your brain in the long term and ensuring you maintain your cognitive abilities even in old age. Getting the shingles vaccine can be a brain-protective measure as well.
Who Can Benefit from the Shingles Vaccine?
According to most health experts, the shingles vaccine is appropriate for adults 50 and years and older. It affects millions of Americans. The CDC reports about 1 in 3 people in the United States will develop shingles in their lifetime.
You are at higher risk of shingles as you get older. This is because their immune function usually weakens over time, which makes viral reactivation more likely. People who’ve had a history of chickenpox, which includes most adults, are at risk.
In addition to individuals with a weakened immune system, those who may be suffering from chronic health conditions, or even high levels of stress, may be more vulnerable to shingles and the inflammation it can cause.
On a very bright note, the Shingrix vaccine is very effective, according to CDC figures. For adults 50 to 69 years, it is 97 percent effective. Over 70 years, it is 91 percent effective.
It’s important to talk to your doctor before getting the shingles vaccine, as it can have side effects and, in rare cases, it may cause severe allergic reactions.
From a brain health perspective, vaccines are a general brain protective measure as they help prevent the infections that can stress your brain and make it more vulnerable to neurodegenerative disease.
Ways to Protect Your Brain from Dementia Right Now
While more research is still needed, the shingles vaccine can be one part of a broader plan of preventive measures you can take to reduce your risk of dementia. Research has consistently shown that early brain care and lifestyle choices play a crucial role in helping people maintain their memory, focus, and cognitive function as they age.
Consider adopting some of the following brain-healthy practices to protect against cognitive decline and memory loss.
1. Reduce Inflammation Through Nutrition
As you have just learned, chronic inflammation can make a major contribution to cognitive decline. It is beneficial to protect your brain cells through brain healthy nutrition.
Ensure your diet is rich in fruits, vegetables, healthy fats like omega-3s, lean proteins, and whole foods. Limit added sugars, processed foods, and unhealthy fats to further reduce the inflammation that could harm your brain.
2. Manage Stress Effectively
Long-term stress can release stress hormones that may damage your brain, especially in the areas that are involved in memory and learning. Embrace practices like prayer, mindfulness, deep breathing, exercise, and social connection to help calm your brain and support your emotional health.
3. Prioritize Quality Sleep
Sleep is essential for brain repair and the consolidation of memory. Poor sleep causes an increase in inflammation and raises the risk of cognitive decline. It’s important to aim to have seven to nine hours of quality sleep every night and address sleep problems early if you have any.
4. Stay Physically Active
Regular movement supports increased brain blood flow, which is fantastic for brain function and health. It also supports the growth of new brain cells, and it can help regulate inflammation. Take part in even moderate activities such as stretching, walking, or strength training. They can make a huge difference.
5. Support Your Immune and Overall Health
You can reduce the strain on your brain and nervous system by preventing infections, managing chronic conditions like high blood pressure and diabetes, and staying up to date with the recommended vaccinations.
6. Get a Professional Evaluation Early
At Amen Clinics, we believe you shouldn’t wait for symptoms to appear before caring for your brain. Using advanced brain SPECT imaging, neuropsychological testing, clinical assessments, and learning your personal health history, our expert clinicians help you understand how your brain is functioning today so that you can take protective measures now.
By identifying potential risk factors such as reduced blood flow, inflammation, or areas under stress early on, we can guide targeted, preventive strategies designed to protect memory, focus, and long-term cognitive health. The earlier you understand your brain, the more power you have to support it for years to come.
Protect Your Health, Protect Your Brain
There may be no single solution for preventing dementia, but growing evidence suggests the shingles vaccine may support long-term brain health by reducing viral reactivation and inflammation, two factors closely linked to cognitive decline. As part of a preventive strategy, it may offer an important layer of protection for your brain as you age.
True brain protection comes from a whole-person approach. Supporting immune health, managing inflammation, prioritizing sleep, staying physically active, reducing stress, and identifying risk factors early all work together to help preserve memory, focus, and cognitive function over time.
At Amen Clinics, we believe the choices you make today can shape your brain health for years to come. And you can start taking action right now.
FAQ About the Shingles Vaccine and Dementia Risk
1. Does the Shingles Vaccine Prevent Dementia or Alzheimer’s Disease?
The shingles vaccine does not guarantee prevention of dementia or Alzheimer’s disease, but research suggests it may help lower risk or slow cognitive decline. By reducing viral reactivation and inflammation that can affect the brain, vaccination may offer an added layer of protection for long-term brain health.
2. Can Shingles Increase the Risk of Dementia?
Yes. Shingles can trigger inflammation in the nervous system, which is strongly linked to cognitive decline and dementia. This immune and inflammatory stress may damage brain cells and disrupt communication over time. Preventing shingles may help reduce this burden on the brain and support long-term cognitive health.
3. Can the Shingles Help Someone Who Already Has Signs of Dementia?
Emerging research suggests the shingles vaccine may offer benefits even for individuals who already show signs of dementia, though it is not a treatment or cure. Some studies indicate that vaccination may be associated with slower cognitive decline and reduced mortality, possibly by lowering viral reactivation and calming chronic inflammation that can worsen brain damage.
Because inflammation and immune stress are known contributors to neurodegeneration, preventing shingles and related immune activation may help reduce additional strain on the brain. However, more research is still needed to fully understand how and to what extent the shingles vaccine may benefit people already living with dementia.
Anyone with dementia or other medical conditions should talk with their healthcare provider to determine whether the shingles vaccine is appropriate for their individual situation. When combined with a comprehensive brain health plan (such as reducing inflammation and stress, and getting excellent sleep, nutrition, and overall medical care) vaccination may be one supportive step toward protecting remaining cognitive function.
4. How Can Amen Clinics Help Me Protect My Brain and Reduce Dementia Risk?
Amen Clinics takes a personalized, whole-brain approach to protecting cognitive health and reducing dementia risk. Rather than relying on guesswork, our experts use brain SPECT imaging to better understand how your brain functions and identify areas that may be under stress or at risk long before symptoms become severe.
Our team evaluates key factors that influence brain health, such as inflammation, blood flow, sleep quality, nutrition, stress levels, medical history, and immune health. Based on this comprehensive assessment, we create a customized brain health plan designed to help support memory, focus, and long-term cognitive function.
By addressing modifiable risk factors early (such as chronic inflammation, infections, metabolic issues, and lifestyle habits), we help patients take proactive steps to protect their brains as they age. Our goal is not just to treat symptoms, but to support lifelong brain health through prevention, education, and targeted care.
If you’re concerned about memory loss, dementia risk, or optimizing your brain health for the future, Amen Clinics offers a science-based, personalized path forward.
Memory issues, cognitive decline, and other mental health conditions can’t wait. At Amen Clinics, we provide personalized, science-backed treatment plans designed to target the root causes of your symptoms. Our 360-approach includes brain SPECT imaging, clinical evaluations, innovative therapeutic techniques, medications (when necessary), and holistic lifestyle recommendations to promote the health of your brain, body, and mind. Speak to a specialist today at 888-288-9834 or visit our contact page here.
Amen Clinics
Founded in 1989 by double-board certified psychiatrist and neuroscientist Daniel G. Amen, MD, Amen Clinics Inc. (ACI) is known as the best brain and mental health company in the world. Our clinical staff includes over 50 healthcare specialists, including adult and child psychiatrists, integrative (functional) medicine physicians, naturopaths, addiction specialists, forensic psychiatrists, geriatric psychiatrists, nutritionists, licensed therapists, and more. Our clinicians have all been hand-selected and personally trained by Dr. Amen, whose mission is to end mental illness by creating a revolution in brain health. Over the last 35-plus years, ACI has built the world’s largest database of functional brain scans—over 250,000 SPECT scans on patients from 155 countries—related to how people think, feel, and behave.
References
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- Centers for Disease Control and Prevention website
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