For adults with Hashimoto's thyroiditis who have normal selenium levels, taking selenium supplements does not lower thyroid-stimulating hormone (TSH) or stop the condition from worsening to overt hypothyroidism, and may cause TSH levels to rise over time.

59

Pro

0

Against

Evidence from Studies

Supporting (1)

59

Community contributions welcome

59

Clinical Outcomes of Selenium Supplementation in Hashimoto's Thyroiditis Without Selenium Deficiency: A Large‐Scale Retrospective Cohort Study

Cohort Study

Human

2026 May

In people with Hashimoto's who aren't low in selenium, taking selenium supplements didn't help their thyroid—it actually made their thyroid markers worse and raised their risk of other autoimmune problems.

Contradicting (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.

Source Study

Clinical Outcomes of Selenium Supplementation in Hashimoto's Thyroiditis Without Selenium Deficiency: A Large‐Scale Retrospective Cohort Study

Score: 59

DOI: 10.1002/edm2.70239

Similar Assertions

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.

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56

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