The Claim

In adults with autoimmune hypothyroidism on levothyroxine therapy, supplementation with selenium at 200 μg/day for 12 months has no clinically meaningful effect on the required dose of levothyroxine.

Source: Selenium supplementation and placebo are equally effective in improving quality of life in patients with hypothyroidism

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
79score
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.

Cause and effect
1 study reviewed
In plain English

Taking selenium supplements daily for a year does not lower the amount of levothyroxine that adults with autoimmune hypothyroidism need to take to manage their thyroid hormone levels.

See the scientific wording

In adults with autoimmune hypothyroidism on levothyroxine, selenium supplementation (200 μg/day for 12 months) does not reduce the required dose of levothyroxine, indicating no clinically meaningful effect on thyroid hormone replacement needs.

What the research says

1 study

  1. Study: Selenium supplementation and placebo are equally effective in improving quality of life in patients with hypothyroidism

    This study gave people with an underactive thyroid selenium pills or dummy pills for a year and found that both groups needed the same amount of thyroid medicine at the end — so selenium didn’t help reduce their pill dose.

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.