Can BPA in tin can linings affect your thyroid?
Yes. Research shows that endocrine-disrupting chemicals like BPA and its alternatives interfere with thyroid hormone balance.
What's actually in it
Tin cans are often lined with epoxy resins that contain BPA (bisphenol A) or its chemical cousins, like BPS. These chemicals are endocrine disruptors: substances that mimic or block your body's natural hormones.
When you store food in these cans, these chemicals can leach into your meal. Once inside your body, they don't just sit there. They interfere with your endocrine system, which is the complex network of glands that controls your hormones, including those produced by your thyroid.
What the research says
The science is clear that these chemicals impact hormone health. A 2026 study in Environ Res found significant associations between exposure to emerging endocrine-disrupting chemicals and the disruption of thyroid hormone balance in pregnant women.
Other peer-reviewed research highlights the systemic risks of these substances. A 2026 study in Environ Sci Technol confirmed that elevated exposure to these types of chemicals increases health risks by specifically targeting and altering thyroid hormone levels.
Even when manufacturers swap BPA for other chemicals, the risk remains. A 2026 study in Environ Pollut showed that both BPA and BPS cause significant biological damage, including oxidative stress and cellular dysfunction.
The research at a glance
What to use instead
Browse our vetted, non-toxic alternatives. Every product is third-party certified.
Shop Non-Toxic Kitchen