What actually removes PFAS from your body and blood (and what doesn't)

As of mid 2026, four interventions have been shown in controlled human studies to lower serum PFAS. Two are old cholesterol drugs. Two involve giving blood away.

Everything else sold as a PFAS detox has no human PFAS data behind it. Some of it has human data showing it doesn't work. A fair amount of it is being recommended by licensed practitioners who should know better.

Disclosure: I'm building NeutraOat, which is trying to join the first list and hasn't yet. It's in the table below with the others so you can compare it directly, and its evidence column says what it should say, which is that the data arrives in October.

The filter that explains everything below

PFAS are not metabolized. Most of what gets sold as PFAS detox falls apart on that one fact, so it's worth being precise about it.

Your body handles most foreign chemicals by chemically modifying them, usually in the liver, until they're water soluble enough to leave in urine or bile. That's what glutathione, NAC, milk thistle and the rest of the liver support category aim at: speeding up a metabolic process that already exists.

PFAS never enter that process. The carbon fluorine bond doesn't break under physiological conditions. There is no phase I or phase II pathway to accelerate, because there is no pathway. Whatever PFAS leaves your body leaves intact.

It leaves by two routes. The kidney can filter it into urine, which happens slowly and which nothing has reliably been shown to speed up. Or the liver can dump it into bile, which carries it into the intestine to be excreted in stool. The catch is that most of what gets dumped into your gut is reabsorbed through the intestinal wall and returns to circulation, a loop called enterohepatic recirculation. That loop is a large part of why the half lives run to years.

So an intervention can work in exactly two ways. It can interrupt the gut loop, catching PFAS in the intestine so they leave in stool instead of cycling back. Or it can physically remove blood, since nearly all your PFAS is riding on albumin in serum.

Everything with human evidence behind it does one of those two things. Nothing on the failed list does either. That is a useful test to apply to anything you get pitched.

What works, plus the one I'm testing

Two notes on the drugs. Neither is approved for reducing PFAS, so using them for it is off label, and both are real medications with real interactions. That's a conversation to have with a physician, not something to order off a coupon site.

The bigger caveat applies to every row. All of these studies measured serum PFAS, not health. We are assuming lower serum PFAS is better because the harm evidence points that way, which I think it does, but nobody has run the trial proving that reducing your burden reduces your risk. Anyone who tells you otherwise is ahead of the data.

Promising, not proven

Plain oat beta-glucan. A 2025 analysis piggybacked on a Canadian cholesterol trial, giving 72 men 3 g of oat beta-glucan daily for four weeks against a rice powder control. Total PFAS fell in both groups, but the clinically prioritized long chain PFAS fell significantly only in the oat group, driven by PFOA and PFOS. That is four weeks, one sex, a secondary analysis, and a small sample. It is the most interesting unproven result in the field, and nowhere near enough to act on. It is also unmodified oat beta-glucan, which is the base material for what I'm building, so read my enthusiasm accordingly.

PFAS-sequestering probiotics. Specific gut bacterial strains have been shown to accumulate PFAS in mice, and at least one company is pursuing this commercially. Preclinical only. Nobody should be buying anything on the strength of it yet.

What doesn't work

Saunas and sweating

Saunas are the most widely recommended PFAS intervention, and the most cleanly refuted.

Look at who refuted it. Stephen Genuis is the researcher whose blood, urine and sweat studies the sauna detox industry cites. He published work showing that phthalates, some PCBs, organochlorine pesticides and flame retardants do come out in sweat. He is not a skeptic of sweat as a detox route. He is the main scientific case for it.

He also tested PFAS and found nothing. In his words, sweating does not appear to clear PFHxS, PFOS or PFOA, the three most common PFAS in human blood. In an earlier case study, only trace amounts of PFHxS turned up in sweat after sauna, and no other PFAS appeared at all. He stopped investigating it and moved on to cholestyramine, which is how cholestyramine entered this literature in the first place.

The mechanism explains why. Your PFAS are bound to albumin in serum. Albumin doesn't go into sweat in meaningful quantities, and neither do the anions riding on it. Sweating hard for an hour removes an impressive volume of water and salt, and close to zero PFAS.

The Institute for Functional Medicine's own page on PFAS interventions still lists sauna use to increase elimination of toxicants through sweat and urine. Other functional medicine training outfits recommend it for PFAS specifically. The evidence against it has been public since 2013, and it came from their own side of the aisle.

Generic binders: charcoal, bentonite, zeolite, chitosan, citrus pectin, chlorella, fulvic acid

These at least aim at the right compartment. Binders act in the gut, which is where the recirculation loop runs. The category isn't absurd on its face, which is part of why it sells.

Two problems. First, not one of them has a published human study showing reduced serum PFAS. Not activated charcoal, not bentonite clay, not zeolite, not chlorella, not modified citrus pectin, not fulvic or humic acid. Binding something in a beaker is not the same as lowering it in serum, and that bar has been cleared by other compounds, so it is clearly clearable.

Second, the binders that do work are selective. Cholestyramine and colesevelam are bile acid sequestrants, and they capture PFAS because PFAS look like the amphipathic anions those resins were built to grab. Activated charcoal's selling point is the opposite: it binds nearly everything. That is a cost. It takes your medications, your fat soluble vitamins and your minerals along with whatever else it catches, which is why the same practitioners recommending it have to warn you to space it away from everything you take.

If a binder worked as well as cholestyramine, someone would have run the 45 person crossover and published it. Cholestyramine is a 1970s generic with no patent and no marketing budget, and it still got studied. Nobody has done the same for charcoal in twenty years of recommending it.

Glutathione, NAC, milk thistle, and liver support generally

This is the category that annoys me most. The mechanism here isn't unproven. It's backwards.

Glutathione conjugation is phase II metabolism. It works on molecules the body can chemically modify. PFAS cannot be chemically modified in the body, so boosting glutathione does nothing for a molecule that never enters glutathione's pathway.

NAC, glycine, liposomal glutathione, milk thistle, dandelion and bitters all do various real things. None of them creates a metabolic pathway for a molecule that doesn't have one. A practitioner recommending them for PFAS specifically has either not thought about the chemistry or is applying a generic detox template without checking whether it fits.

Chelation therapy

EDTA and DMSA are chelators. Chelators work by coordinating metal cations: lead, mercury, arsenic. PFAS are organofluorine anions. The chemistry does not overlap.

Chelation also carries real risk, including mineral depletion and kidney injury, and has killed patients when used inappropriately. Using it for PFAS means accepting that risk in exchange for nothing.

Probenecid, the instructive failure

Worth including because it shows what a serious attempt looks like when it fails. Probenecid inhibits renal organic anion transporters, and since those transporters handle PFAS reabsorption in the kidney, blocking them should in theory increase urinary excretion. It is a real drug with a real proposed mechanism.

The Ronneby group tested it and it went the wrong way. Serum adjusted urinary PFOS came out slightly lower on probenecid, not higher. A mechanism gets you a hypothesis and nothing more than that.

The rest

Coffee enemas, colon cleanses, ionic foot baths, dry brushing, lymphatic drainage, juice cleanses and alkaline water have no mechanism for PFAS and no data for PFAS. Dry brushing in particular is being recommended as a detox step for a molecule bound to a plasma protein.

Paid protocol bundles

The commercial version of all this deserves naming. There are outfits selling private research group memberships that bundle a blood test, a supplement stack (fulvic acid, probiotics and bentonite clay is one real example), and a follow-up blood test, for hundreds of dollars.

The structure is the point. You sell the test, sell the protocol, retest, and attribute whatever the second number does to the protocol. There is no control group, so any downward movement counts as success.

Consider what that means given the actual data. In the Australian trial, the observation group's mean PFOS moved by 0.01 ng/mL over a full year. Untreated serum PFAS is close to flat on the timescale these protocols run. Any one person's before and after difference over 12 weeks is dominated by assay variability, sample timing and regression to the mean, which is why the studies that count use control groups and dozens of participants. A testimonial cannot tell a working intervention apart from noise.

How to evaluate any PFAS treatment claim

1. Does it interrupt the gut loop or physically remove blood? If neither, ask what the proposed route out of the body actually is. There is no third route.
2. Is there a before and after serum PFAS measurement in humans, with a control group or control period? In vitro binding, animal work and testimonials all fail this test. So, for now, does mine.
3. Did the study run long enough to beat noise? Twelve weeks is roughly the floor, and only because the demonstrated effects have been large.
4. Who is selling the test? If the same party sells the test and the treatment, the number you get back is a marketing asset.

What I'd actually do

If you have plausible high exposure, get tested first so you know whether any of this applies to you. Cut ongoing exposure, which mostly means reverse osmosis on your water and attention to animal product sources. Donate plasma if you're eligible, because it's free, safe, and the only intervention on the working list with no downside beyond your time.

If your levels are high enough that a physician thinks a bile acid sequestrant is warranted, that conversation is worth having. The evidence for cholestyramine is good, and the reason it isn't standard practice has more to do with nobody having proven a health benefit than with any doubt about whether it lowers PFAS.

Skip the sauna protocols, the binder stacks and the glutathione. The chemistry says they cannot work for this class of molecule, and where anyone bothered to check, the data agreed.

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Where this goes next

The reason I'm building NeutraOat is that the working list is short and every entry on it has a real problem. Cholestyramine works and is unpleasant enough that few people stay on it. Colesevelam is gentler and weaker. Plasma donation is free and slow and not available to everyone.

NeutraOat is a modified oat fiber designed to do a bile acid sequestrant's job in food grade form, at a lower dose, and with more selectivity about what it binds. Whether it does that in people is the open question our pilot answers in October 2026. I'm not going to tell you it works until my own data says so, and if the data comes back flat I'll publish that too.

If you want to see where it goes, you can reserve a spot for a fully refundable $20 deposit, credited toward your first bottle, refunded on request, no commitment. You'll get the October pilot results before anyone else, whatever they say.

Reserve my place →

Reserving holds your place for a product in active testing. It isn't a treatment, and it isn't a drug approved to treat or prevent any disease. Nothing here is medical advice. Cholestyramine and colesevelam are prescription medications, and any use of them should be directed by your physician.