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Home » Learn » Alzheimer's Disease » What are the Causes and Risk Factors for Getting Alzheimer’s Disease?

What are the Causes and Risk Factors for Getting Alzheimer’s Disease?

At this time, there’s no definitive answer to what actually causes Alzheimer’s disease. Everyday there are new studies touting this new discovery that “may” cause Alzheimer’s.

Really understanding the cause won’t be easy. Everyone has a different biological chemistry that’s impacted by our life experiences such as where we lived or how we handle stress.

Alzheimer’s is likely caused by a combination of things over years of impact such as lifestyle factors, our environment, and genetics.

So let’s talk a little about these three categories.

First, Lifestyle Factors

It’s no mystery that the way we live our life affects our health. Historically, however, we haven’t been taught to think about how these choices affect our brain health.

But it just makes sense that if something we do affects our heart or another aspect of our health, then it likely affects our brain as well. That’s why things such as a poor diet, lack of exercise, chronic stress, along with a lack of purposeful, mental stimulation seem likely culprits to increase our risk.

Next, an Unhealthy Environment

For years, researchers have been pointing to things in our environment that cause cancer. So it seems probable, that many of these things may also have an effect on our brains, potentially leading to Alzheimer’s or another type of dementia.

This includes, but is not limited to, things such as air pollution, food additives, personal care products, plastics, and other synthetics.

It’s seems to be a big unknown.

A study by the National Institutes of Health shows that environmental exposures can result in damaged DNA and cell death.

The study says, “Researchers have found that the biological machinery that builds DNA can insert molecules into the DNA strand that are damaged as a result of environmental exposures.

These damaged molecules trigger cell death that produces some human diseases, according to the researchers.” That sure gets me thinking.

And third, Genetics play a role

There are genetic markers which researchers have correlated to an increased risk of developing Alzheimer’s disease.

One instance of genetics playing a role is when an individual has Early Onset Alzheimer’s and develops the disease between the age of 30 and 60. This represents less than 5% of all diagnoses, but the majority of these cases are from an inherited gene mutation.

For people over age 65, researchers believe that the APOE e4 gene variation increases a person’s risk for getting Alzheimer’s. Everyone has the APOE gene but not the e4 variation which has been directly linked to Alzheimer’s.

Having this gene variation does not mean a person will develop the disease, and some people with Alzheimer’s don’t have the APOE e4 gene.

What is the Number 1 Risk Factor of Developing Alzheimer’s Disease?

Well, it’s age. According to the Alzheimer’s Association*, the risk to developing Alzheimer’s doubles every 5 years after the age of 65.

One in nine Americans over 65 has Alzheimer’s disease, and this increases to one in three over 85. Similar trends exist worldwide.

Additional Risk Factors Include:

Additionally, statistics show that nearly two-thirds of Americans with Alzheimer’s are women. Apparently, the reason for this is unknown but it’s believed to be a combination of life expectancy, biological and genetic variations, and different life experiences.

Additional risk factors include a family history of the disease, and racial and ethnic differences.

So as you can see, nothing is black and white here – it’s pretty much grey.

We may not know for sure what causes Alzheimer’s, but we can incorporate better lifestyle decisions that reduce our risks by doing what makes sense, Together in This.

Visit the TinT resource page and learn more at:

Alzheimer’s Disease: Causes and Risk Factors

Do you have any questions or thoughts? Let me know by commenting below:


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*2015 Alzheimer’s Disease Facts and Figures. Alzheimer’s & Dementia 2015

About Mike Good

Hi, I founded Together in This to help family members caring for someone with Alzheimer’s. Through informative training and easy-to-use tools, I aim to help you take control and have peace-of-mind knowing you are doing the right things.

Comments

  1. Henry Spencer says

    December 8, 2016 at 10:28 am

    I tell them the truth i.e. that at this point in time we do not know what causes Alzheimer’s, but that there appear to be certian lifestyle changes that if adhered to may slow the onset of the disease (even amongst those destined to contract the disease). At the International Alzheimer’s Conference convened in London (Exel) in 2012, researchers maintained that if we could slow down the progress of the disease by 5 years; which they claimed to be possible – then this would effectivelly halve
    the number of Alzheimer’s diagnoses?

    Reply
    • Mike Good says

      December 8, 2016 at 11:44 am

      It does seem that there is something within our control since the percentage of incidence has declined recently. I truly feel we need to get the poisons out of our bodies and follow a heart-healthy lifestyle.

      Reply
  2. Amy R. Borenstein says

    December 14, 2016 at 12:34 pm

    We recently published a book about this topic. It’s titled, “Alzheimer’s disease: Life Course Perspectives on Risk Reduction” (2016 by Elsevier Academic Press). In the book, we describe the interaction and risk factors for pathologic AD and brain/cognitive reserve in the context of the life course. The risk factors for pathologic AD are primarily genetic, and the appearance of symptoms depends on the accumulation of pathology as well as early-life risk factors, socioeconomic influences, and in adulthood, vascular diseases. There are factors that can hasten the age at onset of the disease (smoking, obesity, sedentary lifestyle, for example) and others that can delay it (diet, exercise, social and mental stimulation, for example). You can read more at: https://www.amazon.com/Alzheimers-Disease-Course-Perspectives-Reduction/dp/0128045388

    Reply
    • Mike Good says

      December 14, 2016 at 2:15 pm

      That sounds very interesting, and it looks like it contains a lot of knowledge which is going to help many people better understand the pathology of the disease. Thank you for sharing Amy.

      Reply
    • Paulan Gordon says

      December 31, 2016 at 7:40 am

      I have Vascular Dementia. I am sure that 45 years of smoking and other health risk factors (sleep apnea, lack of exercise and other factors contributed to my situation. It is important that we don’t blame people for having dementia, but we must point out the things that are within our control to reduce our risk.

      Reply
      • Mike Good says

        December 31, 2016 at 9:55 am

        Hi Paulan,
        Thank you for sharing, and I completely agree with you. Also, thank you for what you do to help others through Dementia Mentors 🙂 <3

        Mike

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