Is it safe to warm breast milk in a plastic bottle?
Based on 1 peer-reviewed studybaby
Verdict: Avoid
Worth avoiding. BPA leaches from plastic, especially when heated. Use glass or stainless steel.
What's actually in it
BPA (bisphenol A) is used to harden polycarbonate plastics and line metal cans. It leaches into food and drinks, especially when heated or scratched. BPA acts like estrogen in the body at low concentrations.
Many "BPA-free" products use BPS or BPF instead. Early research suggests these alternatives may behave similarly to BPA.
What the research says
A 2026 study in j occup environ hyg looked at chemical exposure from everyday products and found: PFAS co-positivities identified in more than 10,000 serum/plasma samples..
The research at a glance
| Study | Journal | Year |
|---|---|---|
| PFAS co-positivities identified in more than 10,000 serum/plasma samples. | J Occup Environ Hyg | 2026 |
What to use instead
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