PFAS (per- and polyfluoroalkyl substances), often referred to as "forever chemicals," have earned their nickname due to their persistent nature, which results from their chemical structure being centered on highly resilient fluorine-carbon bonds. Their longevity enhances our daily lives in many ways—such as by creating more effective surface treatments, non-stick and water-repellant products, and smudge-proof and waterproof cosmetics. Food containers (e.g., fast food packaging) also benefit from PFAS, which imparts, among other things, a resistance to saturation.
The fact cannot be overlooked, however, that a number of researchers, in addition to government agencies, have associated PFAS with certain adverse health effects. Their resiliency, therefore, may be a double-edged sword—particularly in conjunction with food contact materials. Since they do not break down easily in the body, PFAS concentrations tend to increase rather than diminish over time.