How people get it: Exposure comes mainly from drinking water and food. Some home water filters are certified to reduce some PFAS.
The basics
What it is
- PFAS are synthetic chemicals used in oil- and water-resistant products such as cleaners, carpets, cosmetics, paints and clothing.
- They are also present in some firefighting foams.
- There are thousands of kinds of PFAS, which can make them hard to study.
- PFAS stay in the environment for an unknown amount of time.
Sources: CDC: PFAS Infographic | PFAS and Your Health ↗ · National Institute of Environmental Health Sciences (NIH): Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) ↗
How people are exposed, and how it may affect health
How PFAS cause health effects is still being researched, and the ways they act have not been confirmed for each effect. PFAS are known to build up in body tissues such as the liver.
Sources: CDC: Health Effects: PFAS Information for Clinicians - 2024 | PFAS and Your Health ↗ · National Institute of Environmental Health Sciences (NIH): Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) ↗
What the research has found so far
- The page says cause-and-effect relationships have not been established for these health effects.
- Small birth weight decreases were under 0.7 ounce for each 1 ng/mL rise in blood PFOA or PFOS.
- A long-term study showed a link between PFAS exposure and higher risk of Type 2 diabetes in women.
- A large study in humans and rodents showed consistent evidence of liver damage.
- Exposure to certain PFAS may be linked with higher risk of thyroid cancer.
- Animal results do not always match human effects because of body differences between species.
Sources: CDC: Health Effects: PFAS Information for Clinicians - 2024 | PFAS and Your Health ↗ · National Institute of Environmental Health Sciences (NIH): Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) ↗
On pFAS and aging, PubMed lists 20 trials in people, 1,095 studies that watched people over time, 475 animal and lab studies. See the counts and searches
Stage 2 because 20 published trials and 55 registered trials in people have been found, but no large ones yet.
A stage shows how far research has got, not whether it will work for you. How stages work
Who may be more affected
Risk of health effects depends on dose, how often, route and length of exposure, plus personal sensitivity and chronic disease.
Source: CDC: Health Effects: PFAS Information for Clinicians - 2024 | PFAS and Your Health ↗
Approval and legal status
The page says no approved medical treatments are available to reduce PFAS in the body. ATSDR has not developed health-based screening based on PFAS blood levels.
Source: CDC: PFAS Information for Clinicians – 2024 | PFAS and Your Health ↗
Questions to ask your doctor
- Is my exposure to pFAS something to think about, given my health?
- Is there a test that measures it, and would it tell us anything useful?
- Which ways of lowering exposure are worth the effort, and which aren't?
- Is anything in my home, work or diet likely to be a big source?
This is general information gathered from the sources listed, not medical advice. Talk to your doctor before starting anything new.
Tools that can lower exposure
Read from each maker's page. The research stage is for the exposure, not for any one product; check a product's certification for what it removes.
What experts say
No expert views collected yet. Each one we add names the person and links to where they said it.
What others are writing
Recent articles about PFAS from health journalists, hospitals and universities. We link to them; we don't write or endorse them.
PFAS, aka 'forever chemicals': What the science says ↗
“The so-called 'forever chemicals' can stick around in the environment - and in our bodies. Scientists agree there is cause for concern. So what should we be doing to mitigate our health risks?”
Stanford Medicine explainer says PFAS persist in the environment and the body, scientists see cause for concern, and small personal steps can lower exposure.
How to get toxic ‘forever chemicals’ out of workplaces ↗
“Organizations have a responsibility for eliminating hazardous “forever chemicals” from their workplaces—and there’s a simple two-part playbook for how to go about it, according to Harvard T.H. Chan School of Public Health’s Joseph Allen and colleagues.”
Organizations should remove hazardous PFAS from workplaces using a two-part playbook focused on buying transparent products and demanding PFAS-free supplies.
Before ‘Forever’ ↗
“You should know three things about per- and polyfluoroalkyl substances (PFAS). The first is that these chemical compounds are persistent. The strength of their bonds prevents them from breaking down in the natural environment.”
The article explains that PFAS, or forever chemicals, persist in the environment and are linked to serious health effects.
Recent research
New studies that mention PFAS appear here after the morning update.
Trials
None of the registered trials of PFAS is one we have linked as aging-related yet.
ClinicalTrials.gov lists 55 registered trials that mention PFAS, for any condition (the count in The science below). Here we show the ones about aging. See them all ↗
The science
Counted from PubMed and ClinicalTrials.gov on Oct 30, 2026, using one search for PFAS in relation to aging. Each link opens the exact search.
- Randomized trials in people
- 12 search ↗
- Large trials (multicenter or phase 3)
- 2 search ↗
- Phase 3 trials
- 0 search ↗
- Trials in people
- 20 search ↗
- Studies that watched people over time
- 1,095 search ↗
- Animal and lab studies
- 475 search ↗
- Registered trials
- 55 search ↗
PubMed search used
(PFAS[tiab] OR "per- and polyfluoroalkyl"[tiab] OR "perfluoroalkyl substance*"[tiab] OR PFOA[tiab] OR PFOS[tiab] OR "forever chemicals"[tiab]) AND (exposure[tiab] OR serum[tiab] OR blood[tiab] OR "drinking water"[tiab]) AND (human*[tiab] OR adults[tiab] OR "Humans"[mh])
Counts are search results, so they include some records that only mention PFAS. How we count
Cite or share this page
Longevity Progress. (n.d.). PFAS ("forever chemicals"): Research stage and evidence. Retrieved October 30, 2026, from https://longevityprogress.com/treatments/pfas
<iframe src="https://longevityprogress.com/embed/stage/pfas" title="PFAS (forever chemicals): research stage on Longevity Progress" width="340" height="72" style="border:0" loading="lazy"></iframe>
The badge shows this treatment's current research stage and links back here. It updates by itself when the stage changes.