PFAS: Where Are These "Forever" Pollutants Hiding, and What Are Their Effects?

They are invisible, highly resistant, and found in many everyday objects. PFAS (pronounced “pifasse”), sometimes referred to as “forever chemicals,” are now at the center of many environmental and health concerns. 

These chemicals were designed to be resistant to water, grease, high temperatures, and stains. While this is remarkably effective from the manufacturers’ perspective, it now raises concerns when these molecules persist in our environment and our bodies.

PFAS: Particularly Persistent Substances

PFAS stands for per- and polyfluoroalkyl substances. It is not a single molecule, but rather a broad family of synthetic chemicals that have been in use since the 1950s.

One of their distinctive features is the presence of extremely strong chemical bonds. As a result, once released into the environment, certain PFAS are very difficult to break down. They can circulate in water, air, and soil and persist for long periods of time.

This remarkable stability explains why they are nicknamed “forever chemicals.” The problem, therefore, is not limited to the product that contains these substances. Over time, PFAS can spread far beyond their original site of use.

Where are PFAS found?

For several decades, the properties of PFAS have been widely exploited by industry. Their resistance to water and grease has made them attractive for many applications.

They can be found, for example, in certain food packaging, nonstick coatings, waterproof textiles, upholstery fabrics, and even in some types of foam used for firefighting.

This wide range of uses partly explains why these substances are now so widespread in the environment.

Exposure does not occur solely through direct contact with products containing these substances. Once present in soil and water, PFAS can contaminate food and enter the food chain. Drinking water is also a potential route of exposure.

What happens to PFAS in our bodies?

The high resistance of these molecules is not limited to the environment. Some of them can also persist in the body.

Scientific research focuses in particular on the consequences of chronic exposure to PFAS. 

The available data show associations with various biological effects, which explains the growing concern among health authorities.

Certain PFAS are being studied in particular for their interactions with the endocrine system. They may also affect lipid metabolism, liver function, and the immune system.

Reproduction is also one of the areas of research, with studies focusing on female and male fertility.

An exposure that can begin before birth

The issue of PFAS also extends to the prenatal period. Scientific studies reported by Inserm suggest that exposure during pregnancy could affect the placenta, an organ that is essential for the exchange of substances between the mother and the fetus.

In particular, associations have been observed with certain risks related to pregnancy and newborn development. These findings underscore the importance of continuing research into the consequences of PFAS exposure during the earliest stages of life.

Scientists are also studying their possible links to certain chronic inflammatory diseases and various cancers. PFOA, one of the most extensively studied PFAS, has been classified as a human carcinogen by the International Agency for Research on Cancer.

Is it possible to avoid PFAS entirely?

It's difficult. Their widespread presence in the environment means that zero exposure is hardly realistic today.

That doesn't mean, however, that we should live in fear of everyday products. The issue is rather one of reducing exposure, especially when alternatives are available.

Choosing durable items, limiting the unnecessary use of products treated to be waterproof or nonstick, and learning about the ingredients in the products you buy can be helpful habits to adopt.

It is also important to distinguish between prevention and “detoxification.” At this time, there is no food or dietary supplement that can be said to eliminate PFAS accumulated in the body. 

Given these persistent pollutants, the priority therefore remains limiting sources of exposure rather than seeking a miracle cure after exposure.

Toward a Reduction in Persistent Pollutants

Awareness is growing. In France, a national action plan focused on PFAS calls for, among other things, strengthening monitoring of these substances, reducing certain uses, and promoting their substitution.

Regulations are also gradually changing to limit their presence in certain consumer products.

PFAS and health have now become a major area of research. Because these substances are numerous, ubiquitous, and persistent, a better understanding of their effects and exposure pathways is essential to ensuring the long-term protection of the public.

For consumers, the most sensible approach is ultimately a simple one: learn more about these substances, reduce avoidable exposure, and, whenever possible, choose alternatives that pose fewer risks to health and the environment.

Source: https://www.inserm.fr/c-est-quoi/polluants-eternels-cest-quoi-les-pfas/