Research Studies
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February 12, 2024

Alzheimer's Was Rare In Ancient History. Why Is The Risk So High Now?

Written By
Medically Reviewed by
Dr. Jeannie Achuff ND
Updated On
January 13, 2025

Seeing a loved one with Alzheimer's disease, or perhaps even facing the journey yourself, can be deeply challenging. The confusion, memory loss, and changes in behavior are not just clinical symptoms; they're personal experiences that touch the hearts of families and individuals.

There's a study that might shine a little bit of light on this tough situation, by taking a look way back into the past. Researchers checked out old health books from ancient Greece and Rome, trying to find any mention of people having problems like Alzheimer's. 

What's interesting is that they hardly found anything. It looks like way back then, losing your memory as you got older wasn't common at all. This makes the researchers think that Alzheimer's and similar problems might have a lot to do with the way we live today, not just because we're getting older.

For anyone going through Alzheimer's, this study might bring a bit of hope. It's a reminder that understanding more about this condition and our lifestyles could help us find new ways to manage it. It's all about learning from the past to make things better now.

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Ancient Insights into Age-Related Dementia

The research led by Caleb Finch at The University of Southern California embarks on a fascinating journey through the available medical knowledge of ancient Greece and Rome. Despite the detailed accounts of various ailments affecting the elderly in these civilizations, including issues like deafness and digestive disorders, there is a conspicuous absence of any mention of severe memory loss. 

This observation challenges the assumption that age-related dementia is a timeless affliction, suggesting instead that its widespread occurrence is a relatively new phenomenon. Factors such as sedentary behavior and exposure to air pollution are implicated as major contributors to the current high rates of dementia. Of notable concern are various environmental pollutants, which are characteristic of contemporary life.

A Glimpse into the Past

According to the research at USC, documentation of conditions resembling mild cognitive impairment (MCI) existed in ancient Greece, but instances of severe memory loss that impacted daily functioning were not reported. This suggests that while the ancient Greeks were aware of age-related cognitive decline, the severe forms of dementia seen today were not commonly observed.

Transitioning several centuries later to ancient Rome, where cities were more dense and they began to use lead in pipes, among other metals, the literature shows a slight increase in the mention of cognitive decline. Notable figures such as Galen and Pliny the Elder documented observations of memory issues among the elderly, suggesting a progression in the recognition of cognitive impairments. However, these cases were still considered rare.

Learning from the Tsimane People

In the absence of concrete demographic data from ancient Greece and Rome, the researchers turned to the Tsimane people of the Bolivian Amazon as a contemporary model for ancient aging. The Tsimane lead a preindustrial and highly active lifestyle, with an astonishingly low rate of dementia. 

This comparison underscores the significant impact of environmental and lifestyle factors on the risk of dementia, suggesting that the modern prevalence of Alzheimer’s could be influenced by changes in our environment and way of life.

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A Call for a Healthier Future

This intriguing study not only enriches our understanding of Alzheimer's disease through the lens of history but also emphasizes the critical role of our environment and lifestyle choices in determining our health outcomes. By looking back at the ancient Greeks and Romans, and learning from the lifestyle of the Tsimane people, we are reminded of the potential to support cognitive health through conscious changes in how we live today. As we move forward, this research encourages a reevaluation of the factors contributing to Alzheimer’s and related dementias, inspiring hope for a healthier future with improved cognitive well-being.

The information in this article is designed for educational purposes only and is not intended to be a substitute for informed medical advice or care. This information should not be used to diagnose or treat any health problems or illnesses without consulting a doctor. Consult with a health care practitioner before relying on any information in this article or on this website.

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1. Creedon, Katie. “9 Common Causes of Dementia.” Rupa Health, 22 Apr. 2022, www.rupahealth.com/post/a-functional-medicine-approach-to-dementia.

2. Finch, Caleb E., and Stanley M. Burstein. “Dementia in the Ancient Greco-Roman World Was Minimally Mentioned.” Journal of Alzheimer’s Disease, vol. Preprint, no. Preprint, 1 Jan. 2024, pp. 1–8, content.iospress.com/articles/journal-of-alzheimers-disease/jad230993, https://doi.org/10.3233/JAD-230993.

3. Gatz, Margaret, et al. “Prevalence of Dementia and Mild Cognitive Impairment in Indigenous Bolivian Forager‐Horticulturalists.” Alzheimer’s & Dementia, vol. 19, no. 1, 9 Mar. 2022, https://doi.org/10.1002/alz.12626.

4. Khakham, Chil. “An Integrative Medicine Approach to Alzheimer’s Disease: Testing, Nutrition, and Supplements.” Rupa Health, 23 May 2023, www.rupahealth.com/post/to-functional-medicine-labs-that-help-individualize-treatment-for-alzheimers-disease.

5. Chil, Khakham. “Understanding Environmental Toxins and Their Impact on Health.” Rupa Health, 10 July 2023, www.rupahealth.com/post/understanding-environmental-toxins-and-their-impact-on-health.

6. Medzerian, David. “Did the Ancient Greeks and Romans Experience Alzheimer’s?” USC Today, 31 Jan. 2024, https://today.usc.edu/alzheimers-in-history-did-the-ancient-greeks-and-romans-experience-dementia/.

7. Peters, Annette. “Ambient Air Pollution and Alzheimer’s Disease: The Role of the Composition of Fine Particles.” Proceedings of the National Academy of Sciences, vol. 120, no. 3, 10 Jan. 2023, https://doi.org/10.1073/pnas.2220028120.

8. Ramírez Ortega, Daniela, et al. “Cognitive Impairment Induced by Lead Exposure during Lifespan: Mechanisms of Lead Neurotoxicity.” Toxics, vol. 9, no. 2, 28 Jan. 2021, p. 23, https://doi.org/10.3390/toxics9020023.

9. Shetty, Shilpa, et al. “Environmental Pollutants and Their Effects on Human Health.” Heliyon, vol. 9, no. 9, 1 Sept. 2023, pp. e19496–e19496, https://doi.org/10.1016/j.heliyon.2023.e19496.

10. Yan, Shijiao, et al. “Association between Sedentary Behavior and the Risk of Dementia: A Systematic Review and Meta-Analysis.” Translational Psychiatry, vol. 10, no. 1, 21 Apr. 2020, www.nature.com/articles/s41398-020-0799-5, https://doi.org/10.1038/s41398-020-0799-5.

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