Are flame retardants linked with thyroid marker changes in children?
A 2026 Canadian cohort found some links between halogenated flame retardants and TSH changes in children, but the authors said the evidence was inconsistent after deeper statistical correction.
Short answer
There is a caution signal, not a clean yes. A 2026 Environmental Research study looked at children aged 8 to 12 in a Canadian birth cohort. Some halogenated flame retardants were linked with changes in thyroid-stimulating hormone (TSH).
The same paper says the results were inconsistent and did not stay statistically clear after false-discovery correction. That means this page should not claim flame retardants clearly disrupt thyroid function in every nursery.
Where exposure can come from
A 2026 Environmental Pollution study notes that upholstered furniture has been a major source of flame retardant exposure in the United States. In that study, people who replaced older furniture foam or upholstered furniture with items made after updated flammability standards had faster declines in several PBDE biomarkers.
What to do in a nursery
Focus on the items you can choose. For baby soft goods, look for simple cotton, muslin, bamboo, or wool textiles. For mattresses and furniture, ask the maker whether added flame retardant chemicals are used.
Organic cotton baby textiles do not solve furniture or mattress exposure. They are just a practical swap for blankets, sheets, and daily soft goods.
The research at a glance
What to use instead
Browse organic cotton baby textiles for soft goods. For mattresses and furniture, ask the maker about added flame retardant chemicals.
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