Can environmental chemical exposure disrupt a baby's sleep patterns?

What's actually in it

Infants are exposed to chemicals from formula packaging, plastic bottles, treated crib mattresses, soft vinyl nursery products, and cleaning products used in the home. These chemicals include phthalates, PFAS, flame retardants, and heavy metals.

Sleep in infancy is not just about rest. It's when the brain consolidates memories, grows, and repairs itself. Sleep disruption in infancy is linked to developmental delays, behavioral problems, and metabolic issues later in childhood.

What the research says

A 2026 study in Environmental Research used an exposome approach, measuring dozens of environmental chemicals simultaneously in infants and their mothers, and then tracked sleep patterns in the first year of life.

Multiple chemical classes were linked to disrupted sleep: phthalates were associated with more nighttime waking, PFAS with shorter total sleep duration, and certain heavy metals with altered sleep architecture (the ratio of light to deep sleep).

Many of these chemicals disrupt melatonin production or cortisol rhythms, which are the hormonal systems that regulate the sleep-wake cycle. A baby's circadian system is still forming in the first months of life, making it especially vulnerable to chemical disruption of these pathways.