Does BPA from plastic affect memory and brain development?
Yes. BPA disrupts hippocampal neurogenesis, which is the process your brain uses to form and store new memories.
What's actually in it
BPA (bisphenol A) is a chemical in hard plastics and the epoxy lining of canned foods. Even if a product says "BPA-free," the replacement chemicals (BPS, BPF) often have the same hormonal activity.
BPA mimics estrogen. Your brain has estrogen receptors, including in the hippocampus, the part of your brain that forms new memories and supports spatial navigation.
What the research says
A 2026 study in Science of the Total Environment found that BPA interferes with a protein called Kinesin-1, which neurons use to transport materials along their structures. When Kinesin-1 is disrupted, neurogenesis (the birth of new brain cells in the hippocampus) is impaired.
The hippocampus is one of the few places in the adult brain where new neurons grow throughout life. This ongoing neurogenesis is tied to learning, memory formation, and mood. BPA essentially puts the brakes on this process.
The effects were seen at levels within the range of typical human exposure, not just at high laboratory doses. People who regularly eat canned foods, use polycarbonate containers, or handle thermal paper receipts have detectable BPA levels that fall in this range.
Children's developing brains are more sensitive to this disruption than adult brains.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Bisphenol-A impairs hippocampal neurogenesis by disrupting Kinesin-1-dependent mechanisms | Science of the Total Environment | 2026 |
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