In Vitro Bioaccessibility and Speciation of Toxic and Nutritional Trace Elements in Brazil Nuts.

ABSTRACT: Brazil nuts (Bertholletia excelsa), mainly from the Amazon, are notable for their exceptionally high selenium (Se) content and are widely consumed as a natural dietary supplement. They also contain potentially harmful elements, including barium (Ba), and exhibit an unusual capacity to accumulate radioactive radium (Ra). In this study, we quantified the concentrations of Se, Ba, strontium (Sr), lanthanum (La), europium (Eu), and the radionuclides ²²⁶Ra and ²²⁸Ra, and assessed their in vitro bioaccessibility-data largely unavailable for these elements to date. Se was highly bioaccessible (≈85%), whereas Ba and Ra, both chemo- and/or radiotoxic, exhibited low bioaccessibility (≈2% each). Nuclear magnetic resonance (NMR) spectroscopy revealed Se to occur predominan

SUBMITTER: Barkleit A 

PROVIDER: S-EPMC12428530 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature