{"id":1008,"date":"2022-03-11T13:36:00","date_gmt":"2022-03-11T21:36:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/some-of-the-worlds-lowest-dementia-rates-are-found-in-amazonian-indigenous-groups\/"},"modified":"2025-05-28T14:41:59","modified_gmt":"2025-05-28T21:41:59","slug":"low-dementia-amazonians","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/low-dementia-amazonians\/","title":{"rendered":"Some of the world\u2019s lowest dementia rates are found in Amazonian indigenous groups"},"content":{"rendered":"\n\n\n    \n                                          \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n          \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img\n                            data-src=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/04\/story-3646-768x432.jpg\"\n          data-srcset=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/04\/story-3646-768x432.jpg 768w\"          data-sizes=\"(min-width:1200px) 75vw, (min-width:768px) 83vw, 100vw\"          class=\"lazyload\"\n        \n                  alt=\"Some of the world\u2019s lowest dementia rates are found in Amazonian indigenous groups\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n  \n      <div class=\"image-caption\">\n          \n<div class=\"f--field f--description\">\n\n    \n  A Tsimane family travels upstream in the local river. (Photo: Courtesy of Michael Gurven\/U.C. Santa Barbara.)\n\n\n<\/div>\n    <\/div>\n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a href=\"\/news\/stories\/\/?category=faculty\">Faculty<\/a><\/li>\n                  <\/ul>\n      <\/nav>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n  <h1>Some of the world\u2019s lowest dementia rates are found in Amazonian indigenous groups<\/h1>\n\n\n<\/div>\n    \n          <div class=\"subtitle\">\n            \n<div class=\"f--field f--description\">\n\n    \n  Research adds to evidence that healthier, pre-industrial lifestyles may hold clues to preventing Alzheimer\u2019s disease and other dementias. <strong>[2\u00bc min read]<\/strong>\n\n\n<\/div>\n      <\/div>\n    \n           <strong class=\"author-field\"><span >By<\/span><a href=\"mailto:communication@dornsife.usc.edu\">Jenesse Miller<\/a><\/strong>\n    \n          <span class=\"post-date-field\">March 11, 2022<\/span>\n      <\/div>\n<\/div>\n\n\n  <\/div><\/div>\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--social-share \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--social-share\"\n    \n      >\n\n    \n  <div class=\"content-wrapper\">\n    <span class=\"a2a_kit a2a_kit_size_32 addtoany_list\" style=\"line-height: 32px;\">\n      <span class=\"title\">\n        Share\n      <\/span>\n                        <a class=\"a2a_button_copy_link\" target=\"_blank\" href=\"\/#copy_link\" rel=\"nofollow noopener\" title=\"Link\">\n            <span class=\"a2a_svg a2a_s__default a2a_s_copy_link\">\n              <svg height=\"19\" viewBox=\"0 0 19 19\" width=\"19\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m7.43475275 9.52380952-2.17490843 2.26076008c-1.08745421 1.058837-1.68841575 2.518315-1.68841575 4.0350275 0 1.5167124.60096154 2.9475732 1.68841575 4.0350274 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10.8c-1.087-2.114-4.046-6.053-6.798-7.995C2.566.944 1.561 1.266.902 1.565C.139 1.908 0 3.08 0 3.768c0 .69.378 5.65.624 6.479c.815 2.736 3.713 3.66 6.383 3.364c.136-.02.275-.039.415-.056c-.138.022-.276.04-.415.056c-3.912.58-7.387 2.005-2.83 7.078c5.013 5.19 6.87-1.113 7.823-4.308c.953 3.195 2.05 9.271 7.733 4.308c4.267-4.308 1.172-6.498-2.74-7.078a8.741 8.741 0 0 1-.415-.056c.14.017.279.036.415.056c2.67.297 5.568-.628 6.383-3.364c.246-.828.624-5.79.624-6.478c0-.69-.139-1.861-.902-2.206c-.659-.298-1.664-.62-4.3 1.24C16.046 4.748 13.087 8.687 12 10.8\"  fill-rule=\"evenodd\" \/>\n              <\/svg>\n            <\/span>\n            <span class=\"a2a_label visually-hidden\">Bluesky<\/span>\n          <\/a>\n                                <a class=\"a2a_button_email\" target=\"_blank\" href=\"\/#email\" rel=\"nofollow noopener\" title=\"E-mail\">\n            <span class=\"a2a_svg a2a_s__default a2a_s_print\">\n              <svg height=\"12\" viewBox=\"0 0 18 12\" width=\"18\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m8.14285714 9.42857143c-.17142857 0-.34285714 0-.51428571.08571428l7.28571427 6.34285719c.3428572.2571428.6857143.2571428.9428572 0l7.2857142-6.34285719c-.0857142-.08571428-.2571428-.08571428-.4285714-.08571428zm-1.28571428 1.11428567v.1714286 8.5714286c0 .6857143.6 1.2857143 1.28571428 1.2857143h14.57142856c.6857143 0 1.2857143-.6 1.2857143-1.2857143v-8.5714286c0-.0857143 0-.0857143 0-.1714286l-7.2 6.3428572c-.7714286.6857143-1.8857143.6857143-2.6571429 0z\" fill-rule=\"evenodd\" transform=\"translate(-6 -9)\"\/><\/svg>\n            <\/span>\n            <span class=\"a2a_label visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n \n\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>As scientists around the world seek solutions for Alzheimer\u2019s disease, a new study reveals that two indigenous groups in the Bolivian Amazon have among the lowest rates of dementia in the world.<\/p>\n<p>An international team of researchers found among older Tsimane and Moseten people, only about 1% suffer from dementia. In contrast, 11% of people age 65 and older living in the United States have dementia, according to the\u00a0<a href=\"https:\/\/act.alz.org\/site\/SPageServer\/\" target=\"_blank\" rel=\"noopener\">Alzheimer\u2019s Association<\/a>.<\/p>\n<p>\u201cSomething about the pre-industrial subsistence lifestyle appears to protect older Tsimane and Moseten from dementia,\u201d said study lead author\u00a0<a href=\"https:\/\/cesr.usc.edu\/people\/staff\/gatz\">Margaret Gatz<\/a>, professor of psychology at the\u00a0USC Dornsife College of Letters, Arts and Sciences and the USC Dornsife\u00a0<a href=\"https:\/\/cesr.usc.edu\/\" target=\"_blank\" rel=\"noopener\">Center for Economic and Social Research<\/a>.<\/p>\n<p>Researchers used computed tomography (CT) brain scan images, cognitive and neurological assessments and culturally appropriate questionnaires \u2014 facilitated by a local team of trained translators and Bolivian physicians \u2014 to diagnose dementia and cognitive impairment among the Tsimane and Moseten.<\/p>\n<p>The study, published in\u00a0<i>Alzheimer\u2019s &amp; Dementia: The Journal of the Alzheimer\u2019s Association<\/i>, found only five cases of dementia among 435 Tsimane people and just one case among 169 Moseten age 60 and over.<\/p>\n<h2>Comparing dementia rates among indigenous peoples<\/h2>\n<p>The roughly 17,000 Tsimane remain physically very active throughout their lifespans as they fish, hunt and farm with hand tools and gather food from the forest. The 3,000 Moseten also reside in rural villages and engage in subsistence agricultural work. Unlike the more isolated Tsimane, they live closer to towns and have schools, access to clean water and medical services, and are more likely to be literate.<\/p>\n<p>The study authors compared their results to a systematic review of 15 studies of indigenous populations in Australia, North America, Guam and Brazil. That earlier review found dementia prevalence ranging from 0.5% to 20% among indigenous older adults.<\/p>\n<p>The fact that indigenous populations in other parts of the world have high rates of dementia may be due to a higher amount of contact with \u2014 and adoption of lifestyles of \u2014 their non-indigenous neighbors. They also face greater risks of diabetes, hypertension, alcohol abuse, obesity and cardiovascular disease.<\/p>\n<p>Researchers say in contrast to the Tsimane, lifestyle factors in higher-income countries \u2014 including lack of physical activity and diets rich in sugars and fats \u2014 contribute to heart disease and may also accelerate brain aging.<\/p>\n<p><a href=\"https:\/\/news.usc.edu\/197541\/some-of-the-worlds-lowest-dementia-rates-are-found-in-amazonian-indigenous-groups\/\" target=\"_blank\" rel=\"noopener\"><i>See USC News for the full story &gt;&gt;<\/i><\/a><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n\n\n\n  \n        \n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-related-stories \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-related-stories\"\n    \n      >\n\n    \n  <div class=\"inner-wrapper\">\n    \n                  <article>\n              \n<div class=\"f--field f--cta-title\">\n\n    \n  <h3>\n          <a href=\"https:\/\/dornsife.usc.edu\/news\/stories\/diabetes-and-alzheimers-risk\/\" \n                        class=\"\" \n      >Scientists find a link between diabetes and risk of Alzheimer\u2019s disease<\/a>\n      <\/h3>\n\n\n<\/div>\n        <\/article>\n              <article>\n              \n<div class=\"f--field f--cta-title\">\n\n    \n  <h3>\n          <a href=\"https:\/\/dornsife.usc.edu\/news\/stories\/male-vs-female-stress-responses-may-explain-sex-differences-in-diseases\/\" \n                        class=\"\" \n      >Male vs. female stress responses may explain sex differences in diseases<\/a>\n      <\/h3>\n\n\n<\/div>\n        <\/article>\n              <article>\n              \n<div class=\"f--field f--cta-title\">\n\n    \n  <h3>\n          <a href=\"https:\/\/dornsife.usc.edu\/news\/stories\/forgotten-memories\/\" \n                        class=\"\" \n      >Forgotten Memories<\/a>\n      <\/h3>\n\n\n<\/div>\n        <\/article>\n            <\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Research adds to evidence that healthier, pre-industrial lifestyles may hold clues to preventing Alzheimer\u2019s disease and other dementias. <strong>[2\u00bc min read]<\/strong><\/p>\n","protected":false},"author":52,"featured_media":1011,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9,10],"tags":[283,64,112,60],"class_list":["post-1008","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dornsife-global","category-faculty","tag-alzheimers","tag-center-for-economic-and-social-research","tag-psychology","tag-research"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Some of the world\u2019s lowest dementia rates are found in Amazonian indigenous groups<\/title>\n<meta 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