Its scientific name is polytetrafluoroethylene, and Teflon is still commonly used to coat non-stick pots and pans.
The dangers of Teflon hit the news a while back, but utensils containing the substance are still widely used throughout the world. A study conducted by the University of Exeter analysed blood samples of around 4000 people and measured their polytetrafluoroethylene concentrations.
The result? Participants with the highest concentrations of this chemical were twice as likely to suffer from thyroid problems. Depending on whether the thyroid is over or underactive, this can lead to fatigue, a slower metabolism, depression or a rapid heartbeat.