LOS ANGELES—A new study reveals two indigenous groups in the Bolivian Amazon have among the lowest rates of dementia in the world, according to an international team of researchers, including those from the University of Southern California (USC). The researchers found among older Tsimane and Moseten people, only about 1 percent have dementia. By comparison, 11 percent of people age 65 and older living in the United States have dementia, according to the Alzheimer’s Association. “Something about the pre-industrial subsistence lifestyle appears to protect older Tsimane and Moseten from dementia,” Margaret Gatz, the lead study author and professor of psychology, gerontology, and preventive medicine at the Center for Economic and Social Research at USC, said in a statement. Published in “Alzheimer’s & Dementia: The Journal of the Alzheimer’s Association,” the study shows that only five cases of dementia were reported among 435 Tsimane people and one case among 169 Moseten …
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