Selenium and thyroid autoimmunity.
Level 5 - mechanism / opinion, no new human data
Narrative review of biological mechanisms and existing literature without systematic methodology or new data.
PubMed 19707359 · doi:10.2147/btt.s2746
What was done
This paper reviewed the biological functions of selenium and selenoproteins (such as glutathione peroxidase, thioredoxin reductase, and iodothyronine deiodinases) in redox regulation and thyroid hormone metabolism, summarizing clinical evidence on selenium supplementation for chronic autoimmune thyroiditis.
What was found
The abstract reports no numerical data. It notes qualitatively that selenium supplementation maximizes antioxidant enzyme activity, may reduce thyroid inflammation, lowers thyroid peroxidase antibody (TPOAb) titers, and improves ultrasound echogenicity patterns, though critical uncertainties remain.
Why it matters
It synthesizes the mechanistic rationale and early clinical evidence for selenium as an adjunctive antioxidant therapy in autoimmune thyroid diseases.
Limits
As a narrative review, it presents no original data, sample size, or systematic methodology. The abstract explicitly highlights that multiple clinical questions remain unresolved before selenium supplementation can be routinely advised for chronic autoimmune thyroiditis.
Cited by
- supports Selenium is vital for the enzymatic conversion of thyroid hormone T4 to T3.