The Pervasive Presence of PFAS 'Forever Chemicals'
Per- and polyfluoroalkyl substances, commonly known as PFAS or 'forever chemicals,' are synthetic compounds found in a vast array of everyday products. These chemicals have been utilised since the 1950s due to their unique ability to repel water and oil, resist high temperatures, and act as surfactants. With approximately 15,000 different PFAS variants, each sharing strong carbon-fluorine bonds, these substances do not readily degrade, leading to persistent accumulation in both the environment and human bodies.
The Environmental and Health Implications
In 2020, European sales of fluoropolymers, a PFAS sub-group, surpassed 39,000 metric tonnes. This continuous influx prevents degradation, allowing PFAS to permeate rainwater, snow, soil, and groundwater. Consequently, these chemicals bioaccumulate in the food chain and human tissues. While complete avoidance is nearly impossible due to their ubiquity, significant exposure reduction is achievable by steering clear of non-essential PFAS-treated items and opting for safer alternatives.
Four Key Product Categories to Monitor
1. Stain-Resistant Textiles
Furniture, carpets, and vehicle interiors often feature PFAS-treated fabrics to resist stains. Exposure can occur through dust ingestion, direct skin contact, or absorption. Historically, stain-proofing products contained PFAS like the now-banned perfluorooctane sulphonic acid (PFOS). Consumers are advised to avoid additional stain-proofing treatments unless a guaranteed PFAS-free option is available, potentially saving money while minimising health risks.
2. Food Packaging and Cookware
PFAS are prevalent in takeaway containers, greaseproof paper, plastic packaging, and disposable tableware. Reducing reliance on disposable food packaging can lower exposure. For home cooking, use reusable containers labelled PFAS-free. Non-stick cookware may release these chemicals when heated, scratched, or worn; replace such items with PFAS-free alternatives like ceramic, stainless steel, or cast iron once the coating deteriorates.
3. Outdoor Clothing
Waterproof outdoor gear, including coats, gloves, and trousers, frequently incorporates PFAS for water resistance. However, studies indicate these chemicals can migrate from products over time. Brands like Patagonia, The North Face, and Columbia now offer PFAS-free lines—check labels for confirmation. When re-treating old items, ensure products like Nikwax TX or Grangers Performance Repel Plus are PFAS-free.
4. Cosmetics
Cosmetics such as foundations, lip liners, cleansers, and hair products often contain PFAS. Recent research suggests cosmetics may enhance PFAS absorption through the skin. While some brands, including H&M and Sephora, provide PFAS-free options, many major manufacturers continue to use these chemicals, necessitating careful label scrutiny.
Understanding the Risks and Regulatory Landscape
The toxic effects of PFAS remain incompletely understood, with variations in persistence and harm. Some PFAS are linked to serious health issues, including cancers, developmental and reproductive problems, hormone disruption, diabetes, and obesity. Environmental impacts are equally concerning; PFAS in oceans can disrupt carbon cycles, reducing photosynthesis and potentially exacerbating greenhouse gas emissions and climate change.
Globally, certain PFAS like PFOS, PFHxS, and perfluorooctanoic acid (PFOA) are banned under the UN Stockholm Convention, with further bans under consideration. The PFAS-contaminated waste management industry is valued at approximately US$2 billion, though remediation is challenging. Incineration at high temperatures can break down PFAS but hinders material recycling.
Regulatory approaches vary; the US has implemented nationwide drinking water limits, while the UK lacks statutory limits, relying on 2022 guidance from the Drinking Water Inspectorate. More stringent actions are needed to develop safer chemicals and ultimately remove PFAS from the market, though this transition will require time and concerted effort.
