Is it safe for pregnant women to drink milk from cartons lined with plastic?
Not ideal. Milk consumption is a notable infant PFOA exposure route.
What's actually in it
Pregnant and breastfeeding women often increase dairy intake for calcium and protein. Milk comes in plastic jugs, plastic-lined cardboard cartons (tetra pak), or glass bottles. Each packaging type contributes different chemistry. Plastic-lined cartons have thin polyethylene or aluminum-polyethylene laminate that contacts the milk throughout the shelf life.
PFAS and microplastics in milk matter because both transfer to breast milk.
What the research says
A 2025 systematic review in J Appl Toxicol examined early-life dietary exposure to PFOA through milk consumption. Milk and dairy products contributed meaningfully to infant and toddler PFOA exposure. Packaging was one factor along with farm contamination and processing equipment.
During pregnancy and breastfeeding: glass-bottled milk from local dairies is the cleanest option. If tetra pak is the available choice, transfer remaining milk to a glass pitcher after opening. For plant milks, glass-bottled options (Malk, Elmhurst, some regional brands) skip the carton. If all that's available is plastic-jug milk, prefer HDPE (#2) over other types and don't store at high temperatures.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Early-Life Dietary Exposure to Perfluorooctanoic Acid (PFOA) Through Milk Consumption: A Systematic Review. | J Appl Toxicol | 2025 |
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