The Claim

In patients with Hashimoto’s thyroiditis, selenium supplementation increases serum selenium concentrations and the expression of antioxidant proteins GPx3 and SePP1, which are correlated with reductions in thyroid autoantibody levels and thyroid-stimulating hormone (TSH) levels, indicating a biological association between selenium status and autoimmune activity.

Source: Effect of selenium on thyroid autoimmunity and regulatory T cells in patients with Hashimoto’s thyroiditis: A prospective randomized‐controlled trial

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
56score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
1 study reviewed
In plain English

In people with Hashimoto’s thyroiditis, taking selenium supplements raises levels of selenium and certain antioxidant proteins in the blood, and these changes are linked to lower levels of thyroid autoantibodies and TSH.

See the scientific wording

In patients with Hashimoto’s thyroiditis, selenium supplementation increases serum selenium and antioxidant proteins (GPx3, SePP1), which correlate with reductions in thyroid autoantibodies and TSH, suggesting a biological link between selenium status and autoimmune activity.

What the research says

1 study
  1. Study: Effect of selenium on thyroid autoimmunity and regulatory T cells in patients with Hashimoto’s thyroiditis: A prospective randomized‐controlled trial

    Taking selenium supplements helped people with Hashimoto’s thyroiditis lower their harmful antibodies and improve thyroid function, likely because selenium boosted their body’s natural antioxidant defenses.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.