The Claim

In patients with subclinical Hashimoto’s thyroiditis not on levothyroxine, six months of 200 μg/day selenium yeast supplementation is associated with a significant reduction in thyroid-stimulating hormone (TSH) levels by an average of 0.16 mIU/L, while untreated controls show an increase of 0.48 mIU/L.

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.

Correlation
1 study reviewed
In plain English

In people with early-stage Hashimoto’s thyroiditis who are not taking thyroid medication, taking 200 micrograms of selenium yeast daily for six months is linked to a small decrease in TSH hormone levels, whereas those not taking selenium experience a small increase.

See the scientific wording

In patients with subclinical Hashimoto’s thyroiditis not on levothyroxine, six months of 200 μg/day selenium yeast supplementation is associated with a significant reduction in thyroid-stimulating hormone (TSH) levels by an average of 0.16 mIU/L, while untreated controls show an increase of 0.48 mIU/L, suggesting selenium may improve thyroid function in early-stage disease.

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 supplements for six months helped lower a key thyroid hormone (TSH) in people with early-stage Hashimoto’s, while those who didn’t take it got worse. So selenium may help the thyroid work better in the early stages.

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

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