The Claim

Higher urinary iodine levels are associated with a weaker relationship between fluoride exposure and thyroid volume enlargement in school-age children, suggesting that iodine may reduce the impact of fluoride on the thyroid.

Source: Iodine Modifies the Susceptibility of Thyroid to Fluoride Exposure in School-age Children: a Cross-sectional Study in Yellow River Basin, Henan, China

What the research says

Supports is higher

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

Supports
44score
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

When kids have more iodine in their urine, fluoride doesn’t seem to make their thyroid gland grow as much—so iodine might help protect their thyroid from fluoride’s effects.

See the scientific wording

Higher urinary iodine levels are associated with a weaker relationship between fluoride exposure and thyroid volume enlargement in school-age children, suggesting iodine may reduce fluoride's impact on the thyroid.

What the research says

1 study

  1. Study: Iodine Modifies the Susceptibility of Thyroid to Fluoride Exposure in School-age Children: a Cross-sectional Study in Yellow River Basin, Henan, China

    This study found that kids with more iodine in their urine had less thyroid swelling from too much fluoride, meaning iodine might protect the thyroid from fluoride’s harmful effects.

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

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