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.

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Pro

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Against

Evidence from Studies

Supporting (1)

56

Community contributions welcome

56

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

Randomized Controlled Trial

Human

2021 Jul

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.

Contradicting (0)

0

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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

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

Score: 56

DOI: 10.1111/cts.12993

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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85%

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.

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85%

In adults with Hashimoto's thyroiditis who are not taking levothyroxine, taking 200 micrograms of selenium yeast daily for six months is linked to a measurable decrease in two types of thyroid antibodies, while those not taking selenium show no change.

56

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83%

Among adults with Hashimoto's thyroiditis who have normal selenium levels, taking selenium supplements may be linked to a 63% higher chance of dying from any cause over five years, even though there is no evidence it increases the risk of thyroid cancer or the need for thyroid surgery.

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83%

In people with Hashimoto's thyroiditis who have normal selenium levels, taking selenium supplements daily for six months or longer is linked to sustained increases in thyroid antibodies and hormone levels over five years.

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82%