Mattresses and bedding may expose children to potentially harmful chemicals during sleep. Digest
Young children spend a large portion of the day asleep, making their sleeping environment an important but often overlooked source of potentially harmful indoor pollutants. To address this, researchers investigated how much exposure occurs during sleep and which sources drive it.
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Parents placed three small silicone sheets in their child's bedroom for seven days: one hung on a metal stand to monitor room air, one on the mattress under the bedsheet, and one on the mattress with its top covered to isolate chemicals from the mattress. The researchers screened for 51 semivolatile organic compounds, which are chemicals that slowly escape from materials into air and dust: phthalates (plastic softeners), organophosphate esters (often used as flame retardants), and UV filters used to protect materials from sunlight.
- Chemicals were found in all tested locations, but the air around the child's bed contained more detected compounds and often higher concentrations than the general bedroom air. A total of 28 chemicals were detected in the room air, 31 in the bed area, and 30 from mattresses.
- Several plastic softeners and flame retardants were more concentrated in the samples capturing emissions from the mattresses, indicating that mattresses can be an important source of these chemicals.
- One compound (tris(2-butoxyethyl) phosphate) was found at higher levels in the bed area than in mattress-only samples, suggesting that for some chemicals the bedding or other textiles may be more important sources than the mattress itself.
- Older mattresses were associated with higher levels of certain phthalates, consistent with material breakdown and changes in manufacturing practices over time.
These findings indicate that a child's bed is not just part of the normal indoor environment but forms a distinct sleeping microenvironment shaped by both the mattress and surrounding items. Because young children spend many hours in close contact with these materials, the measured emissions could contribute meaningfully to their overall exposure.
Although the study was relatively small and did not assess how much of these substances were actually taken up by the children, it highlights the importance of the sleep environment. Selecting products tested for chemical emissions and maintaining adequate ventilation may help reduce potential exposure. In this clip, Dr. Andy Galpin explains how elevated bedroom CO₂ levels can disrupt sleep and outlines proven strategies to reduce them.