Study finds Amazon indigenous group's lifestyle may hold key to slowing down aging ANI | Updated: May 27, 2021 19:38 IST Los Angeles (California) [US], May 27 (ANI): A team of international researchers has found that the Tsimane indigenous people of the Bolivian Amazon experience less brain atrophy than their American and European peers. The decrease in their brain volumes with age is 70 per cent slower than in Western populations. Accelerated brain volume loss can be a sign of dementia. The study was published in the Journal of Gerontology, Series A: Biological Sciences and Medical Sciences. Although people in industrialised nations have access to modern medical care, they are more sedentary and eat a diet high in saturated fats. In contrast, the Tsimane have little or no access to health care but are extremely physically active and consume a high-fibre diet that includes vegetables, fish and lean meat.