97% of AmericansNearly everyone carries them
CDC biomonitoring has detected PFAS in the blood of about 97% of Americans. The question isn't if you've been exposed, it's how much.
More detail →
At-Home Testing. Real Answers.
Forever Chemicals
Forever Chemicals
(PFAS).
Measured in you.
At-home blood testing for Forever Chemicals, analyzed in a CLIA-certified lab.
With a clear report you can actually understand.
Know your exposure
Tap waterNonstick cookwareFood wrappersMicrowave popcornRain jacketsCarpets & upholsteryCosmeticsDental flossFirefighting foamElectronicsPizza boxesStain-proof fabricYour total body burdenHow you compare to U.S. percentilesCompound-by-compound levelsSerum trends over timeExposure-source cluesEvidence-linked health context
Tap waterNonstick cookwareFood wrappersMicrowave popcornRain jacketsCarpets & upholsteryCosmeticsDental flossFirefighting foamElectronicsPizza boxesStain-proof fabricYour total body burdenHow you compare to U.S. percentilesCompound-by-compound levelsSerum trends over timeExposure-source cluesEvidence-linked health context
Why Exposure Matters
They're called "forever chemicals" for a reason
PFAS are man-made compounds used for decades in everyday products. They don't break down easily in the environment, or in you.
97% of Americans
Peer-reviewed researchLinked to real health outcomes
Peer-reviewed research has associated PFAS exposure with cholesterol, thyroid, immune, liver, and fertility-related effects.
See the evidence →
Half-lives of yearsThey stay for years
Some PFAS have half-lives in the human body measured in years. Knowing your levels is the first step to lowering them.
How half-lives work →
The 40 we measure
Every compound on the panel.
Every compound on the panel.
Tap one to see what it is.
Grouped by how long each one stays in the body from years down to days.
Long-lived (years)Intermediate (months)Short-lived (days–weeks)No established human half-life
Don’t let your environment compromise your health
From cookware to cosmetics, everyday life exposes you to Forever Chemicals you cannot see, taste or feel.
Our lab test measures 40 of them in your blood so you can find your sources and take control of your exposure.
Non-stick cookware
Drinking water
Cosmetics
Food packaging
Everyone carries them
Detection is the norm.
Detection is the norm.
Concentration is the question.
PFAS are detectable in the serum of essentially the entire population of industrialised countries.
Here is what 100 Americans look like.
Per 100 people in the US · CDC NHANES 2017–2018
0%at or above 2 ng/mL: summed PFAS, detection is near‑universal
0%at or above 20 ng/mL: screening advised
0%below 2 ng/mL: the rare exception
Detection is the norm; it is the concentration that carries the information which is exactly what your report tells you.
Source: National Academies of Sciences, Engineering, and Medicine (2022), estimated from CDC NHANES 2017–2018.
How it works
From Doorstep
See the full journey →
From Doorstep
to Dashboard
01
The Kit
Arrives ready to use.
02
The Collection
Five minutes, at home.
03
The Analysis
Research-grade precision.
04
The Results
Numbers you can act on.
Every step, explained in full.
Learn more about how it works →
Ready When You Are
Understand your exposure. Then lower it.
One kit. A CLIA-certified analysis. A dashboard that turns your results into a plan.
CLIA-Certified Lab Testing
Secure & Private Results
Science-Backed Education
30-Day Return Policy
Measured in nearly everyone
Detection is the norm concentration is the question
Since 1999 the CDC has measured PFAS in the blood of a representative sample of Americans every two years. Detection is almost universal, so the number that matters is not whether you carry PFAS it is how much.
First what is “ng/mL”?
It means nanograms per millilitre. A nanogram is one billionth of a gram, and a millilitre is about a fifth of a teaspoon of blood. So “2 ng/mL” is two billionths of a gram of PFAS in a fifth-teaspoon of blood a vanishingly small amount that only lab-grade mass spectrometry can even see. It matters not because it is “a lot” by weight, but because even these tiny amounts are biologically active and clear from the body only very slowly.
What the 2 ng/mL line means
The National Academies set a summed-PFAS level (the sum of seven compounds) of 2 ng/mL as the point below which health effects are not expected. About 98% of people are above it which is why a simple “detected / not detected” result tells you almost nothing.
What the 20 ng/mL line means
Above 20 ng/mL, the National Academies advise added screening with your clinician a lipid panel, and thyroid, kidney and other checks depending on your history. About 9% of the US population sits here.
Why a number, not a yes/no
Two people can both “have PFAS” while one sits comfortably low and the other is in the screening range. Your report places your own summed level against these thresholds and against people your age and sex, so you know which of the three groups you are in.
Why measure your own level
Because “everyone has some” is not an answer. Only your own number tells you whether you sit in the safe band, the watch band, or the screening band and only a repeat test shows whether the changes you make are actually working. A yes/no cannot do either. Measuring turns an invisible, unfelt exposure into something you can track and act on.
Thresholds: National Academies of Sciences, Engineering, and Medicine, Guidance on PFAS Exposure, Testing, and Clinical Follow-Up (2022) read it free at the National Academies. Population figures estimated from CDC NHANES 2017–2018. This is exposure information for education and is not a diagnosis.
Prepaid return included
Everything you need arrives in one discreet box and everything you need to send it back is already inside. There is nothing to print, buy or arrange.
What is in the boxA sterile collection device, lancets, alcohol wipes, a step-by-step guide with a QR code to the video walkthrough, and a sealed biohazard mailer.
The return label is prepaidA tracked, prepaid shipping label is already attached to the return mailer. Seal the sample, drop it in the post the same day, and track it to our lab.
Discreet on both legsPlain packaging out, plain packaging back. Nothing on the outside says what is inside.
Sample stabilityDried blood spots are stable at room temperature for shipping, so a normal postal transit does not affect the result.
Shipping is included in the price of the test. If a kit is damaged in transit, we replace it at no charge.
No clinic visit
The sample is a few drops of blood collected at home in about five minutes, whenever it suits you. No appointment, no waiting room, no needle in the arm, no phlebotomist.
How it worksA small device is pressed to the upper arm; a gentle vacuum draws a few drops of capillary blood onto a collection card. Most people describe it as a light pinch.
Guided the whole wayPrinted instructions plus a short video walkthrough (scan the QR code in the box). Support is one message away if you have a question mid-way.
Why capillary blood is enoughOur laboratory method is validated for dried blood spots and converts them to serum-equivalent values using published per-compound factors, so results are comparable with clinical reference ranges.
When to collectAny time of day; no fasting needed. Collect on a weekday so the sample reaches the lab without sitting over a weekend.
If a collection does not go to plan, a replacement device is sent free of charge.
40 PFAS in ng/mL
Your sample is analysed in a CLIA-certified laboratory by liquid chromatography–tandem mass spectrometry (LC-MS/MS), the reference method used by the CDC for PFAS biomonitoring. Every compound is quantified, a real number in nanograms per millilitre not just flagged as present.
40 compounds, 5 chemical classesLegacy PFAS (PFOA, PFOS, PFHxS, PFNA), newer “GenX-type” replacements, fluorotelomers, precursors and short-chain PFAS the widest at-home panel available.
SensitivityDetection limits in the low parts-per-trillion range, so the method can find a drop of water in an Olympic swimming pool.
Quality controlEach run includes calibration standards, isotope-labelled internal standards and blank checks. A result is only released when the controls pass.
Benchmarked, not just measuredYour numbers are compared with the CDC’s national NHANES survey for your age and sex, and read against the National Academies of Sciences, Engineering, and Medicine (NASEM) 2022 follow-up thresholds.
Results describe exposure. They are not a diagnosis and do not tell you whether PFAS caused any specific condition.
Results in 7–10 days
Your results are ready 7–10 days after your sample reaches the laboratory. They land in your private dashboard not as a generic PDF with every number explained in plain language.
Your PFAS Load ScoreOne number that summarises your overall exposure, plus your percentile against the U.S. population.
Compound by compoundAll 40 measured compounds with your level, the national comparison and what each one is used in so you can see where exposure is likely coming from.
A ranked action planConcrete steps ordered by impact: water filtration, cookware, packaging, workplace and more, with a retest clock to see the trend over time.
For your clinicianA printable summary written for doctors, with the NASEM follow-up guidance that applies to your band.
Timing starts when the lab receives the sample; postal transit is usually 1–3 days on top. You are emailed the moment results are ready.
Across the whole country
Nearly everyone carries them
Since 1999 the CDC has measured PFAS in the blood of a representative sample of Americans every two years. The result has barely changed: about 97% of people tested have measurable PFAS.
The four found in almost everybodyPFOS, PFOA, PFHxS and PFNA turn up in nearly every sample. They are the “legacy” compounds used for decades in non-stick coatings, stain repellents, firefighting foam and food packaging.
Levels have fallen for those fourAfter US manufacturers phased them out, national PFOS levels dropped by more than 85% and PFOA by more than 70%. Newer replacement chemistries are not part of that story, and some are only now being tracked.
Exposure is everyday, not exoticDrinking water, fish and other foods, house dust from treated carpet and furniture, grease-proof wrappers, and some cosmetics. Most people get a little from several routes rather than a lot from one.
You cannot feel itPFAS cause no symptoms on their own, and no routine blood panel measures them. The only way to know where you stand is to measure.
Source: CDC National Health and Nutrition Examination Survey (NHANES) biomonitoring, 1999–2018. Percentages describe the population, not any individual; your own level can only come from your own test.
What the research points to
Linked to real health outcomes
In 2022 the National Academies of Sciences, Engineering, and Medicine reviewed the human evidence and sorted it by how strong it is. This is their grading, not ours.
Sufficient evidence of an association
- Immune: a weaker antibody response to vaccines
- Cholesterol: higher total and LDL cholesterol
- Pregnancy: lower birth weight and reduced fetal growth
- Kidney: increased risk of kidney cancer
Limited or suggestive evidence
- Thyroid: thyroid disease and altered function
- Liver: raised liver enzymes
- Pregnancy: high blood pressure and pre-eclampsia
- Cancer: breast and testicular cancer
- Gut: ulcerative colitis
What the numbers mean for youThe same report set two thresholds for the sum of seven PFAS in blood: below 2 ng/mL, effects are not expected; between 2 and 20, your doctor may prioritise cholesterol, thyroid and pregnancy screening; above 20 ng/mL, kidney and testicular cancer checks are added. Your report shows where you fall.
Source: NASEM, Guidance on PFAS Exposure, Testing, and Clinical Follow-Up (2022). “Associated with” means observed together in studies of people; it is not a diagnosis, and a result cannot tell you whether any effect will happen to you.
Days, weeks, months, years
They stay for years
A half-life is how long your body takes to clear half of a chemical. For the long-lived PFAS that is measured in years, so what you absorbed a decade ago is still partly with you.
PFHxS8.5 yearsfirefighting foam, stain repellents
PFDA7.3 yearsski wax, cosmetics, fluorinated bottles
PFOS5.4 yearslegacy Scotchgard, foam, plating
PFOA3.8 yearsnon-stick processing aid, packaging
PFNA3.3 yearscosmetics, ski wax, coatings
PFBA · PFBS · PFHxAdays to weeksthe short-chain replacements
What that means in practiceStop the exposure today and half of your PFOS is still there in five years, a quarter in ten. It is why levels only move once the source is found and cut and why a repeat test a year or two later is the honest way to see the trend.
Half-lives are published human estimates (ATSDR and peer-reviewed cohort studies); ranges vary by study and by person. Only compounds with an established human value are listed. See all fourteen on the timeline ↓