A Novel Approach to Estimate Mercury Exposure Risks Through Fish Consumption Based on the Selenium-Mercury Molar Ratio.

ABSTRACT: In contrast to mercury, an extremely toxic element, selenium is an essential micronutrient, which by complexing with mercury can mitigate its toxicity. In this regard, we quantified mercury and selenium concentrations in samples (n = 309) of fish tissues and analyzed the Se:Hg molar ratio and HBVSe as toxicological risk biomarkers. The data indicated that mercury levels in planktivorous fish (0.630 ± 0.202 mg kg-1) and carnivorous fish (1.196 ± 0.513 mg kg-1) were above the Brazilian limits considered safe for daily consumption. The highest selenium concentrations were observed in planktivores (0.272 ± 0.093 mg kg-1) and the lowest in herbivores (0.099 ± 0.092 mg kg-1). Molar ratios greater than one and positive HBVSe values were found in 42% of the fish samples (n = 131). As a result, we

SUBMITTER: Cabral CDS 

PROVIDER: S-EPMC12390280 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature