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Man-made chemicals that pose health risks to humans
Per- and poly-fluoroalkyl Substances (PFAS) are a group of man-made chemicals that have been manufactured and used around the world since the 1940s. PFAS have unique properties that make them repel water and oil. Because of these properties, these chemicals have been used in protectant formulas and surface coatings of many products, such as carpets, food packaging, non-stick coatings, construction materials and firefighting foams typically used at airports and chemical facilities. Industries in the United States have phased out certain PFAS chemicals because of their associated health risks to humans.
These chemicals are very persistent in the environment and in the human body – meaning they don’t break down and can accumulate over time. If humans or animals ingest PFAS (by eating food or drinking water that contain these chemicals), they are absorbed, can build up in the body over time and potentially lead to adverse health effects.
Animal studies have shown that PFAS can cause reproductive and developmental, liver and kidney, and immunological effects. The most consistent findings from human studies are increased cholesterol levels among exposed populations, with more limited findings related to:
Scientists are still learning about the health effects of exposure to per- and poly-fluoroalkyl substances. Because animals and humans process these chemicals differently, more research is needed to fully understand how PFAS impact human health.
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