Briefing Note Response to
Zannoni, N., Lakey, P. S., Won, Y., Shiraiwa, M., Rim, D., Weschler, C. J., … & Williams, J. (2025). Personal care products disrupt the human oxidation field. Science Advances, 11(21), eads7908.
Response by toxicologists Barae Jomaa, PhD, ERT and Lyle Burgoon, PhD ATS
Key Takeaways
This study lacked key scientific rigor, including baseline variance reporting, clear differentiation between measured, modeled, and calculated data, and proper statistical analyses. Furthermore, OH radicals are extremely short-lived and localized, making them ineffective for meaningful air cleaning in a person’s breathing zone – there should be caution when extrapolating findings from a small, artificial chamber study to real-world health implications. While the study observed chemical changes when lotions and fragrances were introduced, it did not assess whether these changes pose health risks, and the highly fragile nature of the OH field limits its practical significance. At the end of the day, the study should not be a cause for concern for consumers.
Response by Barae Jomaa, PhD ERT
Key Takeaways
There were no health risk conclusions drawn – while the study observed chemical changes, it did not assess whether these changes pose a health risk. Chemistry alone does not imply harm without consideration of exposure levels – dose makes the poison. Furthermore, while the OH field can theoretically act as a personal air-cleaning zone, its fragility suggests that it likely has minimal practical benefit in real-world air purification. Should this study be a cause for concern? Probably not.
Full Response
The research shows that when ozone in the air reacts with human skin, it can create a personal field of hydroxyl (OH) radicals, an important atmospheric oxidant. The concentration of this OH field was found to be around 2 × 10⁵ molecules cm⁻³, which is on par with levels found in some outdoor environments.
The experiments show that both lotions and fragrances suppress the personal OH field. Some ingredients, like monoterpenes, can both generate and consume OH, while others such as phenoxyethanol or ethanol primarily consume it. A sensitivity test with linalool, a terpene, conducted without ethanol showed that OH reactivity increased while OH levels dropped only slightly, suggesting that in the absence of strong OH sinks, some products may have a smaller impact on OH concentration. In other words, the effect of personal care products on the OH field depends on the composition of the product being used.
The study focuses specifically on volatile organic compounds (VOCs) emitted from personal care products and skin. These include compounds like phenoxyethanol, ethanol, isoprene, and monoterpenes, which interact with ozone and OH radicals in complex ways. While the findings offer valuable insight into how VOCs influence the personal oxidation field, it is important to note that they are not necessarily representative of all personal care products, which vary widely in composition.
Importantly, while humans might create their own localized air-cleaning zone, the study’s main finding is that this field is exceptionally fragile and easily disrupted.
This fragility stands in stark contrast to the OH field in the outdoor atmosphere, which is a vast, stable reservoir that is not easily depleted by small-scale disruptions. The fact that the personal OH field is so easily negated by common products calls into question its relevance for actually cleaning the air in a person’s breathing zone.
Moreover, while Zannoni et al. document chemical changes, they do not conduct a full risk assessment to determine if the net effects are beneficial or harmful to human health. It is the dose that makes the poison and an altered chemical environment alone is not sufficient to conclude on potential adverse health effects.
Response by Lyle Burgoon, PhD ATS
Key Takeaways
This study tracked hydroxyl (OH) radical formation around humans exposed to ozone, suggesting a “personal oxidation field.” However, key scientific standards were lacking: there was no baseline variance reporting, the use of “replicates” was misleading, and there was a lack of clear distinction between measured, modeled and calculated data. OH radicals are short-lived and extremely localized, degrading within milliseconds and millimeters. As a consequence, they can’t meaningfully clean the air in a person’s breathing zone or neutralize real indoor pollutants. This study ultimately implies a broader health relevance without justification, extrapolating from a small, artificial chamber study to the real world, without supporting data. It is an example of how scientific publishing is skewed by hype and poor peer review, using a provocative hypothesis to promote unsubstantiated claims. Should this study be a cause for concern regarding consumers using cosmetics? No.
Full Response
Cologne, Chamber Studies, and the Cult of Chemical Bullsh*t
It started — like all absurd things do — with a man who claimed to know the truth. A shaman of pseudoscience. A backyard wizard with thoughts on skin chemistry. He came armed with jargon, conviction, and just enough science to make the bullshit believable.
He told me we all emit an electrical field. That our bodies produce supercharged ions — raw, natural electricity forged in the ozone-filled air and the holy oils of our skin. That we’re protected by a bioelectric barrier, a kind of biochemical forcefield that Big Soap has spent billions to destroy. Lotion? The enemy. It smothers our God-given armor. Fragrance? A molecular Judas, selling us out with every whiff of bergamot and synthetic vanilla.
This wasn’t science. This was chemical Gnosticism with a PayPal link.
And I laughed. I dismissed it as another crunchy grift in a world overflowing with chlorophyll drops, EMF detox patches, and fasting influencers who look like they’ve never lifted a lunch tray.
But then, a week later, the absurd looped back.
A friend of mine — credible, smart, plugged into the cosmetics world — sent me a paper. A real paper. Peer-reviewed. Published in Science Advances (https://www.science.org/doi/10.1126/sciadv.ads7908). You’ve probably seen it or a post about it on the socials.
And wouldn’t you know it? The core idea was eerily familiar: skin oils, ozone, hydroxyl radicals, and the implication that fragrances and lotions are altering our airspace and potentially our health.
Suddenly, what had sounded like internet voodoo was now parading around in a lab coat, cashing in on the credibility of empirical science.
That’s when I went down the rabbit hole. Stunning imagery! Lots of math! A striking hypothesis – but the methodology doesn’t hold up under scrutiny. Buckle up, because here we go!
Let’s talk about the oxidation field — a phrase that sounds like something out of a Marvel script written during a ketamine bender. According to a recent paper in Science Advances, four men were sealed into an exposure chamber and blasted with 38–45 ppb ozone. The researchers then tracked the birth and death of hydroxyl radicals (OH•), claiming these microbursts of chemistry form a reactive halo around your body — a kind of invisible hygiene aura that reacts with lotions, perfumes, and presumably, your sins.
This isn’t science. This is narrative engineering with a pipette.
Lotion Logic and Fragrance Fakery
Here’s the twist: the researchers didn’t even bother to calculate the variance in OH• concentrations when no lotion was applied. That’s right — when establishing their “baseline,” they skipped the part where you figure out the variability or wobble in the data.
Yet somehow, they found the motivation to model the variance with lotion and with fragrance — which, by the way, put the OH• levels square in the calculated zone. But do any observed differences mean anything? Who the hell knows — they never give you the noise on the baseline (but recall, fragrance is squarely in the calculated zone – there’s no difference). It’s like weighing yourself once in the morning, chugging a gallon of kombucha, weighing again, and declaring a metabolic miracle without checking your scale’s accuracy.
Measured vs. Modeled vs. Calculated: Pick a Damn Lane
Let’s break this down in plain terms:
- Measured: That’s data with scars on it. Real readings. Hard fought. No ambiguity.
- Modeled: That’s theory dressed in spreadsheets. Based on assumptions, guesses, and a whole lot of smoothing.
- Calculated: That’s a math problem using chosen constants — useful, but fragile as hell if your inputs are fiction.
Now ask yourself: which one is the paper’s benchmark — the no-lotion condition? Is it measured? Modeled? Calculated? They don’t say. Which is like selling you a house without telling you if the foundation is cement, cardboard, or a pile of raccoons.
Replicate Experiments? Please.
They use the term “replicates.” But guess what? These aren’t replicates. They’re different arms of a study — meaning the setups are different, the conditions are different, the subjects may even be different. Comparing them is like comparing Peloton output across different bikes and calling it precision fitness.
In other words: this is not a replication. It’s a parallel storyline, not a repeated test.
The OH Radical Myth: Too Fast, Too Small, Too Close
Hydroxyl radicals have the lifespan of a tweet and the range of a fruit fly. Nanoseconds to milliseconds of life. A millimeter of travel. That’s it. They’re born, they die, and they never leave the neighborhood.
To matter, they’d need to affect the breathing zone — where viruses, bacteria, mold, and your mother-in-law’s casserole fumes linger. But they don’t. If they did, we’d already have marketed “Skin Field Tech” to kill airborne pathogens. We haven’t. Why? Because it doesn’t work.
Where The Hell Are the Stats?
Let’s stop pretending. You can draw as many pretty lines on a graph as you want — but if you don’t run the stats, you’re not doing science. You’re coloring with expensive crayons.
And that’s exactly what this paper does. Sure, the plots look sexy. Smooth lines. Clean separation. Designer chemistry. Volvo could take lessons here! But it’s optical pornography. It looks like signal, but you never told us about the noise.
Let me say that again for the folks in the back: they didn’t do the stats. No error bars that matter. No statistical models saying this is different from that. Just vibes and vector graphics.
This is Rule Number One when you’re calling bullshit in science:
“If you can’t show me the noise, then I can’t trust your signal.”
Are the measured, modeled, or calculated OH concentrations actually different from the benchmark? Who the hell knows. Because they didn’t tell us. We can’t tell whether lotion or fragrance caused a biologically significant change — or if the whole thing is just a glorified chemical shrug.
They give us smooth lines. But no spread. No variance. No statistical models to separate effect from illusion.
And that’s not a minor oversight. That’s foundational failure of scientific rigor.
If your whole pitch hinges on the idea that personal care products alter the oxidation field around your body, but you can’t be bothered to tell me if the effect is real or just a graphical hallucination, then congratulations — you’ve just sold uncertainty as insight. This isn’t fraud – it’s the natural endgame of publishing incentives run amok.
Real Pollutants Don’t Care About Your Cologne
Let’s talk about what’s actually floating in your air: particulate matter, including viruses, bacteria, spores; ozone; lots of other gases.
What do OH radicals do about that? Nothing. Maybe they tweak a few VOCs, maybe they oxidize a terpene. But they’re not scrubbing your air. They’re not cleaning house. They’re playing chemical ping pong with your squalene and calling it innovation.
The Real Crime: Selling Speculation as Implication
Here’s the thing. Scientists aren’t immune to the pressures of the attention economy. You want to get published? You sell it. You stretch it. You puff it up. You imply — without directly stating — that your chamber chemistry has real-world, real-body, real-health implications.
But when you do that? When you extrapolate from four dudes in a Tupperware full of ozone to the lives of billions breathing indoor air — you don’t just dilute your science. You erode public trust.
And that, my friend, is the greatest pollutant of all.