Strong Support
correlational
In older adults with healthy thyroid function and normal selenium levels, slightly higher selenium levels in the blood are weakly linked to slightly lower T4 and slightly higher T3 relative to T4,...
68
0
Evidence from Studies
Supporting (1)
68
Community contributions welcome
68
Randomized controlled trial of the effect of selenium supplementation on thyroid function in the elderly in the United Kingdom.
Randomized Controlled Trial
Human
2008 FebContradicting (0)
0
Community contributions welcome
No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.