Babies stack every multiplier: everything they eat passes through plastic (usually heated), they live at floor level where dust concentrates, they mouth everything, and their dose-per-kilo lands during the developmental window when it matters most. A 2021 study found PET microplastics in infant stool at concentrations far above adults’.
The good news is the dose is concentrated in two sources, and both are fixable this week. (The longer science briefing, including what not to feel guilty about, is here.)
Fix one: feeding
- Glass bottles — the single highest-impact swap in the nursery, ~$30 for four. Same nipples, same routine, sleeves available for grip.
- Staying with plastic bottles? Use the researchers’ own protocol: prepare hot formula in a glass or steel vessel, cool to body temperature, then pour into the bottle. Never pour boiling water into plastic; never microwave a bottle.
- Sterilize smart: steam-sterilizing plastic bottles accelerates shedding. Glass doesn’t care.
- When solids start: glass jars and stainless or silicone feeding gear beat the plastic bowl set.
Fix two: the floor
- Sealed HEPA vacuum weekly — cheap vacuums re-aerosolize the fine fraction; sealed bagged machines trap it.
- Wet-dust surfaces; dry dusting just relaunches particles.
- Shoes off at the door — free, and covers tire dust too.
- Wash synthetic plush and blankets before first use; prefer cotton/wool for the things that live in the crib.
The middle tier
- One-piece natural rubber pacifier — no seams, no plastic shield, nothing to crack (mind latex allergies).
- Mouth-toys in wood, rubber, or silicone — triage by what actually gets chewed, not by what’s visible on the shelf.
- Secondhand smart: older hand-me-down plastic toys can predate current chemical rules and are age-brittled (sheds more). Mouth-stage toys: buy new or natural. Shelf toys: secondhand is great.
What you can ignore
The stroller, the car seat (non-negotiable safety gear), the bath toys that get rinsed cold, and the diaper question this month — you cannot fix everything at once. Bottles and floor first. Everything else is bonus rounds.