The Body of Evidence 162 – Mercury in your mouth
Dec 3, 2025
Sophie, a conversational co-host, dives into the pressing issue of mercury in dental fillings. They discuss the global movement to phase out mercury and the surprising history behind dental amalgams. Christopher reveals the dangers of mercury exposure, from past incidents like the Minamata disaster to its current use in cosmetics and mining. They tackle whether existing fillings pose a risk and the irony of removing them. The conversation highlights the environmental impact, making a strong case for a worldwide ban on mercury.
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What Silver Fillings Actually Are
- Dental amalgams are roughly 50% mercury mixed with other metals and were widely used as inexpensive, durable fillings.
- Despite historical toxicity concerns, modern assessments show only tiny mercury exposure from intact fillings, far below toxic thresholds.
Prevent Cavities First
- Prevent needing fillings by brushing, flossing, using fluoride, and seeing your dentist regularly.
- Simple dental hygiene steps reduce reliance on any type of filling material.
Minamata: The Origin Story
- Minamata, Japan (1956) saw industrial mercury dumped in wastewater, causing mass poisoning via contaminated seafood.
- That disaster gave the Minamata Convention its name and spurred global mercury controls.