Your Dental Fillings Are Leaking BPA Into Your Mouth

The white filling your dentist put in last year? It's slowly releasing BPA into your mouth. Every day. And the amount changes over time.

What the Study Found

A 2026 study in Polymers tested modern resin-based dental composites for BPA release and found it's time-dependent. The fillings leach BPA into saliva, and the rate of release varies as the filling ages. It's not a one-time burst. It's an ongoing, chronic exposure directly into your mouth.

Resin-based composites are the most popular tooth-colored filling material used in dentistry today. Millions of people have them. And the BPA they release goes straight into your saliva, gets swallowed, and enters your bloodstream.

Why Mouth Exposure Is Different

Your mouth is warm, wet, and acidic. Saliva, chewing force, and temperature changes from hot and cold food all accelerate chemical leaching. And unlike BPA on your skin, BPA in your mouth gets absorbed through the mucous membranes and swallowed into your gut. It's a direct route into your body.

What You Can Do

Ask your dentist about BPA-free composite options. They exist. If you're getting new fillings, ask specifically what resin is being used and whether it contains bisphenol A. For existing fillings, talk to your dentist about your options at your next visit.

Browse our non-toxic home essentials for reducing chemical exposure at home.

Also see non-toxic kitchen essentials for safer alternatives.

Source: Aliberti A, Di Duca F, Piscopo M, et al. (2026). Polymers.