The Claim

Six months of 200 μg/day selenium yeast supplementation in adults with Hashimoto’s thyroiditis increases serum selenium levels from a median of 73.6 μg/L to 187.2 μg/L and elevates glutathione peroxidase 3 (GPx3) and selenoprotein P1 (SePP1), indicating enhanced antioxidant capacity.

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.

Quantitative
1 study reviewed
In plain English

Taking 200 micrograms of selenium yeast daily for six months raises selenium levels in the blood and increases the activity of two selenium-dependent proteins involved in antioxidant defense in adults with Hashimoto’s thyroiditis.

See the scientific wording

Six months of 200 μg/day selenium yeast supplementation in adults with Hashimoto’s thyroiditis increases serum selenium levels from a median of 73.6 μg/L to 187.2 μg/L and elevates glutathione peroxidase 3 (GPx3) and selenoprotein P1 (SePP1), indicating enhanced antioxidant capacity.

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

    This study found that taking selenium yeast pills for six months helped people with Hashimoto’s thyroiditis boost their selenium levels and improve their body’s natural antioxidant defenses, just like the claim says.

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.