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Infants and toddlers may be breathing in plasticizers—called phthalates—and other harmful chemicals from their mattresses while they sleep, according to two University of Toronto studies published in the journals Environmental Science & Technology and Environmental Science & Technology Letters.
These chemicals have been linked to neurological and reproductive problems, asthma, hormonal disruption, and cancer.
In the first study, researchers measured chemical concentrations in 25 bedrooms of children aged 6 months to 4 years old. They found more than two dozen phthalates, flammables, and UV filters in the air in these bedrooms, with the highest levels found around the beds.
In a follow-up study, the researchers tested 16 newly purchased children’s mattresses, and confirmed that they were likely to be the main source of these chemicals in children's sleep environments. When the researchers simulated the child's body temperature and weight on these mattresses, chemical emissions increased significantly severalfold. These mattresses were purchased in Canada, but most of them contained materials made in other countries, including the United States and Mexico.
"Sleep is vital for brain development, particularly for infants and toddlers. However, our research suggests that many mattresses contain chemicals that can harm kids’ brains," said senior study author Miriam Diamond, a professor in the Earth Sciences Department at the University of Toronto. " This is a wake-up call for manufacturers and policymakers to ensure our children’s beds are safe and support healthy brain development."