For healthy older adults in the UK with normal selenium levels, taking selenium supplements daily for six months does not improve how the body converts the thyroid hormone T4 into its more active...

Pro

Against

Evidence from Studies

Supporting (1)

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Randomized controlled trial of the effect of selenium supplementation on thyroid function in the elderly in the United Kingdom.

Randomized Controlled Trial

Human

2008 Feb

Contradicting (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

Randomized controlled trial of the effect of selenium supplementation on thyroid function in the elderly in the United Kingdom.

Score: 68

DOI: 10.1093/AJCN/87.2.370