Can PFAS from nonstick products cause thyroid cancer?

What's actually in it

PFAS are used in nonstick cookware, food packaging, stain-resistant fabrics, and waterproof clothing. They get into your body through food, water, and air. Once inside, they travel through your bloodstream and accumulate in organs, including your thyroid gland.

Your thyroid is a small butterfly-shaped gland in your neck. It produces hormones that control your metabolism. Thyroid cancer rates have been climbing for decades, and researchers are looking at environmental chemicals as a possible reason.

What the research says

A 2026 study in Ecotoxicol Environ Saf compared PFAS levels in people with papillary thyroid cancer to healthy controls. They looked at PFAS mixtures, not just individual chemicals.

People with thyroid cancer had higher blood levels of multiple PFAS than cancer-free controls. The risk increased with the total PFAS mixture burden, meaning the more types of PFAS you're exposed to, the higher your risk.

The cancers linked to higher PFAS exposure weren't just more common. They were also more aggressive, with larger tumors and more spread to lymph nodes. PFAS may not just trigger cancer but make it grow faster once it starts.

The researchers found that the combined effect of PFAS mixtures was stronger than any single PFAS chemical alone. Since everyone is exposed to multiple PFAS from different products, the real-world risk comes from the mix.