Summary
This observational study characterised blood antioxidant micronutrient status in riparian communities along the Tapajós River in the Brazilian Amazon, examining how seasonal variation, sociodemographic factors, and livelihood practices influence antioxidant nutrient levels. The findings demonstrate that manganese, selenium and zinc levels in this population exceed Brazilian population averages, whilst β-carotene elevation is seasonal (rainy season only). Occupation type—particularly combined farming and fishing—modulates antioxidant status, with implications for understanding nutritional resilience in Amazonian subsistence communities.
Regional applicability
This study is geographically specific to the Brazilian Amazon and may have limited direct applicability to United Kingdom farming or nutritional contexts. However, the methodology for assessing antioxidant micronutrient status in relation to seasonal food availability and livelihood diversity could inform UK research on nutritional outcomes in communities with variable dietary access or occupational diversity.
Key measures
Blood copper, manganese, selenium, zinc, β-carotene, lycopene, vitamin A and vitamin E concentrations; associations with wet/dry seasons, smoking status, sex, alcohol consumption, occupation type (farming, fishing, mixed), and state of origin
Outcomes reported
The study measured blood concentrations of antioxidant micronutrients (copper, manganese, selenium, zinc, β-carotene, lycopene, vitamins A and E) in riparian villagers and their associations with seasonality, sociodemographic factors, occupation, and lifestyle practices. Blood antioxidant nutrient levels were compared to Brazilian population averages and examined for seasonal and community-level variation.
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