The Claim
Soil acidity negatively influences selenium accumulation in Brazil nuts, with lower pH reducing selenium uptake even when total soil selenium is high.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Brazil nuts absorb less selenium from soil when the soil is more acidic, even if the soil contains high levels of selenium.
See the scientific wording
Soil acidity negatively influences selenium accumulation in Brazil nuts, with lower pH reducing selenium uptake even when total soil selenium is high.
In acidic soil, the roots of Brazil nut trees cannot take up selenium effectively because the chemical form of selenium changes and the transporters that move it into the plant stop working properly, so even if there is plenty of selenium in the ground, the tree absorbs very little of it.
What the research says
1 studyStudy: Natural variation of selenium in Brazil nuts and soils from the Amazon region.
Even if the soil has lots of selenium, Brazil nuts absorb less of it when the soil is too acidic — like how some plants struggle to drink water if the ground is too sour.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.