Using old or damaged Teflon coating on pans can pose certain risks. Here are some potential concerns:
Release of toxic fumes: Teflon coatings can release toxic fumes when they are overheated or exposed to temperatures above 500°F (260°C). This phenomenon, known as "Teflon flu" or polymer fume fever, can cause symptoms such as headache, fever, chills, and respiratory distress. While normal cooking temperatures rarely reach this level, damaged or scratched Teflon coatings may release fumes at lower temperatures.
Potential ingestion of Teflon particles: If the Teflon coating is damaged, scratched, or worn off, there is a risk that small particles of the coating can get into the food you're cooking. While ingesting small amounts of Teflon is generally considered non-toxic, it is best to avoid consuming Teflon particles as a precautionary measure.
Reduced non-stick properties: Over time, the non-stick properties of Teflon coatings may deteriorate, leading to food sticking to the pan's surface. This can make cooking and cleaning more challenging, as well as increase the likelihood of scratching or damaging the coating further.
Potential for ingestion of degraded chemicals: If the Teflon coating is old or damaged, it may be more prone to degradation. This can result in the release of chemicals into the food that could be potentially harmful if ingested.
To minimize these risks, it is generally recommended to replace pans with damaged or heavily worn Teflon coatings. Consider using alternative types of cookware, such as stainless steel, cast iron, or ceramic, which do not have the same concerns associated with Teflon coatings.