Pick up two moisturizers from a shelf marked “clean.” Turn them over. One leaves out parabens, sulfates and synthetic fragrance. The other leaves out parabens and silicones, keeps fragrance, and adds a dozen essential oils instead.
Both are clean. Both are telling the truth. The word has no legal meaning in the United States, and no federal agency has even written a policy about it.
This is a number that reframes the whole category. A 2022 study in the journal Dermatitis pulled 1,470 products marketed as “clean” from two national retailers’ websites and checked every ingredient list against known skin allergens. Of those, 93.8% contained at least one potential allergen. Fragrance and botanical ingredients were the most common group by far, appearing in 82.9%.
Clean is a sales category. It isn’t a safety finding. Knowing the difference changes what you look at on the package.
Where “clean” sits among label words
Every claim on a product is backed by one of four things, and sorting claims into those four buckets is the single most useful habit a label reader can build.
Some words are defined in regulation. Organic is the clearest example in US food law, with a federal program, accredited certifying agents and specific percentage tiers that a company must meet before printing the word.
Some words are governed by agency policy instead. “Natural” on food works this way. FDA has never done rulemaking to define it, but the agency has a longstanding policy treating it to mean that nothing artificial or synthetic has been added to a food that wouldn’t normally be there. FDA says plainly that the policy doesn’t address production methods such as pesticide use, doesn’t address processing methods, and that the agency didn’t consider whether “natural” should describe any nutritional or health benefit. That term has its own article in this series.
Some words carry a private certification, which means a nonprofit or a company wrote the criteria and checks who meets them.
And some are completely undefined. “Clean” lands in that last group, and it sits a notch below “natural,” because at least “natural” has a published federal policy behind it. “Clean” has no rule and no policy. It means whatever the brand or the store decides it means, and that decision can change.
FDA has been unusually blunt about neighboring words in cosmetics. On its page about “cruelty free” and “not tested on animals,” the agency writes that “there are no legal definitions for these terms,” which is exactly why companies can use them without restriction.
FDA tried to define a word like this once, and lost in court
There’s a piece of history here that explains why these terms stay loose.
In February 1974, FDA proposed a rule that would have let a company call a cosmetic “hypoallergenic” only if human testing showed a significantly lower rate of adverse skin reactions than comparable products. Manufacturers would have carried the testing burden. FDA issued the final rule on June 6, 1975.
Two cosmetics companies sued. A federal district court sided with FDA. The DC Court of Appeals then threw the regulation out, finding that FDA hadn’t shown consumers understood “hypoallergenic” the way the rule described.
FDA’s page on the term now says there are no federal standards or definitions governing its use, and that it means whatever a particular company wants it to mean. Manufacturers don’t have to send FDA any proof. The page also notes that products labeled this way generally use the same basic ingredients as other cosmetics.
That’s the pattern. A descriptive marketing word is hard to pin down legally. It stays loose, and the loose version is the one on your shelf fifty years later.
What US cosmetics law requires now
Something real did change recently, and it matters because it’s the actual floor under every product, clean or not.
The Modernization of Cosmetics Regulation Act of 2022, which FDA shortens to MoCRA, is the biggest change to US cosmetics law in decades. According to FDA’s MoCRA page, current as of August 2026, it requires several things that didn’t exist before.
Facilities that manufacture or process cosmetics have to register with FDA and renew every two years. FDA can suspend a registration when a product from that facility has a reasonable probability of causing serious health consequences or death.
A designated responsible person has to list every marketed cosmetic product with FDA, including its ingredients, and update that listing every year.
That same responsible person has to keep records substantiating the safety of each product. Neither the law nor FDA’s regulations require any specific test, and animal testing is not required. The supporting data has to come from scientifically sound methods.
Serious adverse events have to be reported to FDA within 15 business days, with a copy of the product label, and new information received within a year of that report has to be submitted too.
FDA can now order a recall when a company refuses to recall voluntarily and the product could cause serious health consequences or death.
MoCRA also directs FDA to establish fragrance allergen labeling requirements and good manufacturing practice regulations. Certain small businesses are exempt from the registration, listing and manufacturing-practice requirements, though that exemption doesn’t extend to products that are injected, intended for internal use, regularly contact the mucous membrane of the eye, or alter appearance for more than 24 hours without the consumer removing them.
Now notice what is not on that list. MoCRA did not create premarket approval. FDA’s page on its authority over cosmetics says the agency does not approve most cosmetics or their ingredients before they go on sale, with color additives as the exception. Manufacturers and marketers carry the legal responsibility to make sure a product is safe under labeled or customary conditions of use.
FDA does prohibit or restrict a specific set of ingredients by regulation, and the list is short: eleven ingredients or ingredient groups. It includes bithionol, chloroform, methylene chloride, halogenated salicylanilides, mercury compounds with a narrow exception for certain eye products, vinyl chloride and zirconium complexes in aerosols, and chlorofluorocarbon propellants.
So the fair summary of US cosmetics regulation after MoCRA goes like this. Companies must register, list their products, substantiate safety, report serious injuries and submit to recall authority. Nobody at FDA signs off on a formula before it ships.
The free-from fallacy
We walk through the structural problem with “clean,” and it applies to a clean label on a snack bar exactly as much as to a face serum.
A product defined by what it lacks tells you nothing about what it contains.
Take parabens, since they appear on nearly every clean exclusion list. Parabens are preservatives that keep bacteria and mold out of water-based products. FDA’s page on parabens, current as of November 2025, says the agency continues to review published studies and that “we do not have information showing that parabens as they are used in cosmetics have an effect on human health.” FDA hasn’t declared them unsafe. It says it will advise industry and the public if it ever concludes otherwise. That’s a genuine open question, sitting in the insufficient-evidence tier, not a settled finding either way.
Now the part the exclusion list doesn’t show you. If a preservative comes out, something has to take its place, or the product has to be reformulated so it needs less preservation. The replacement might be better, worse, or simply different. The label doesn’t say. You’ve been told about an absence and told nothing about the substitute.
The second half of the fallacy is about amount. An ingredient’s name doesn’t determine its safety. The dose and the exposure do. This is the oldest principle in toxicology, and it’s the piece most shoppers were never taught.
Research backs that up. A survey across eight European countries with 5,631 participants, published in Food and Chemical Toxicology in 2019, found large gaps in everyday understanding of basic toxicological principles, and found that less knowledge went along with more fear of chemicals. Work by the same group in Risk Analysis that year reported that most people were unaware that natural and synthetic substances behave the same way under those principles.
That fear has a name in the literature, chemophobia, and the research on it is sympathetic rather than scolding. A 2020 experiment in Food and Chemical Toxicology with 448 participants compared two approaches. Giving people plain information about dose and response lowered both chemophobia and the preference for natural substitutes. Trying to shift how people felt about chemicals, without the information, didn’t lower chemophobia at all.
So say the fair part out loud. Wanting fewer unnecessary additives in something you put on your skin every day is a reasonable preference. Shorter ingredient lists have real value, including fewer things to test if you do react. “Chemical” is not a synonym for harmful, and water is a chemical, but a shopper who wants simplicity isn’t being irrational. The preference is fine. The problem is that “clean” is a poor tool for acting on it.
Natural ingredients are not hypoallergenic ingredients
This is where the clean category runs into a specific, well-documented contradiction.
FDA’s page on organic cosmetics takes it head on. Asked whether cosmetics made with organic ingredients are safer, FDA answers no. The agency explains that an ingredient’s source does not determine its safety, and that many plants, organically grown or not, can be toxic or allergenic.
Dermatologists see the result in clinic. The 2022 Dermatitis study of 1,470 clean-marketed products found fragrance and botanical ingredients to be the single most common allergen category, present in more than four of every five products. Citrus derivatives, linalool and limonene, all fragrance components that occur naturally in plants, each turned up in roughly a fifth to a quarter of the products.
A smaller 2021 study in the same journal looked at 84 tattoo aftercare products from 52 brands and catalogued their marketing claims. The most common claim of all was “natural ingredients,” on 42.9% of the products. Those same products averaged about eight allergens each from the American Contact Dermatitis Society’s core screening series, with fragrances and botanicals again leading the count.
None of this means botanical ingredients are dangerous. Most people use them without any trouble. It means that swapping a synthetic preservative for a plant extract moves you from one set of possible reactions to a different set. The badge on the front of the box has no opinion about which set suits your skin.
A retailer’s clean badge is a buying policy
When a store puts a clean badge on a shelf tag or a website filter, it has done something real. It has written a list of ingredients it won’t carry and is enforcing that list on its suppliers.
That is a purchasing decision. It is not a safety determination, and no government agency reviewed it.
Two stores can disagree completely, and they do. One might exclude a preservative another permits. One might ban an entire class of ingredients while another bans only certain members of that class. One might exclude an ingredient because customers asked, not because any agency flagged it. Both badges say “clean.” Neither store is lying.
The right way to read a store badge, then, is as information about the store rather than about the product. It tells you what that retailer decided to stop selling. If you want to know why, look for the published exclusion list, which retailers running these programs generally make available, and see whether their reasons line up with yours.
What to do instead of trusting the word
This is a routine that works better than the badge. It takes a minute the first time and seconds after that.
Read the ingredient list, not the front panel. FDA requires an ingredient declaration on cosmetics sold at retail to consumers, under the Fair Packaging and Labeling Act and 21 CFR 701.3. Leaving it off makes a product misbranded. That list is a legal requirement. The word on the front is not. Reading those lists well is a skill of its own, and this series covers it separately.
Learn your own short list. Most people who react to cosmetics react to a handful of specific things, often a fragrance component or a particular preservative. Knowing your two or three beats any category label on the market.
Treat a new product as a test. Use a small amount, in one spot, for several days before putting it everywhere. A reaction is far easier to trace when you’ve changed only one thing.
Ask what replaced what. If a product advertises the absence of a preservative, look at what’s preserving it instead, or whether it carries a short shelf life for that reason.
Check where the claim comes from. If a badge comes from a third party, find that organization and read its criteria. If the claim is just a word printed on the carton, treat it as advertising, because that is what it is.
When a reaction needs a doctor
Most skin reactions to cosmetics are mild and clear up once you stop using the product. Some don’t, and those deserve attention.
Get emergency care or call 911 for swelling of the lips, tongue or face, trouble breathing or swallowing, or hives spreading across your body after using a product. That isn’t irritation. That’s an allergic emergency.
Make an appointment with a board-certified dermatologist if a rash keeps returning, spreads beyond where you applied the product, blisters or weeps, or is still there a couple of weeks after you stopped. Ask specifically about patch testing, which identifies the ingredient driving an allergic contact reaction instead of leaving you to guess by elimination. Bring the actual containers, or clear photos of the ingredient lists, to that visit. A dermatologist can read an ingredient panel far faster than you can.
You can also report a cosmetic product problem to FDA. Under MoCRA, companies must report serious adverse events to the agency within 15 business days, and FDA publishes cosmetic adverse event data for the public.
What to take away
“Clean” is the only major label word in this group that has neither a regulation nor an agency policy behind it. That’s the fact to carry out of here.
In practice it means a list of excluded ingredients, written by a brand or a store, that disagrees with the next company’s list. It tells you what somebody decided to leave out. It tells you nothing about what went in instead, nothing about the amount, and nothing about whether the excluded ingredient was ever a problem at the dose used.
The ingredient list on the back of the package is a legal requirement. The word on the front isn’t. When the two compete for your attention, the small type wins.
Sources
- U.S. Food and Drug Administration. “Modernization of Cosmetics Regulation Act of 2022 (MoCRA).” fda.gov
- U.S. Food and Drug Administration. “FDA Authority Over Cosmetics: How Cosmetics Are Not FDA-Approved, but Are FDA-Regulated.” fda.gov
- U.S. Food and Drug Administration. “Prohibited & Restricted Ingredients in Cosmetics.” fda.gov
- U.S. Food and Drug Administration. “Hypoallergenic Cosmetics.” fda.gov
- U.S. Food and Drug Administration. ““Organic” Cosmetics.” fda.gov
- U.S. Food and Drug Administration. “Cruelty Free / Not Tested on Animals.” fda.gov
- U.S. Food and Drug Administration. “Parabens in Cosmetics.” fda.gov
- U.S. Food and Drug Administration. “Use of the Term Natural on Food Labeling.” fda.gov
- USDA Agricultural Marketing Service. “Labeling Organic Products.” ams.usda.gov
- PubMed. “Tran JM, Comstock JR, Reeder MJ. “Natural Is Not Always Better: The Prevalence of Allergenic Ingredients in ‘Clean’ Beauty Products.” Dermatitis, 2022. DOI: 10.1097/DER.0000000000000863.” doi.org
- PubMed. “Liou YL, Liszewski W, Schlarbaum JP, Warshaw EM. “Characterization of Tattoo Aftercare Products: Allergenic Ingredients and Marketing Claims.” Dermatitis, 2021. DOI: 10.1097/DER.0000000000000635.” doi.org
- PubMed. “Bearth A, Saleh R, Siegrist M. “Lay-people’s knowledge about toxicology and its principles in eight European countries.” Food and Chemical Toxicology, 2019. DOI: 10.1016/j.fct.2019.06.007.” doi.org
- PubMed. “Saleh R, Bearth A, Siegrist M. “‘Chemophobia’ Today: Consumers’ Knowledge and Perceptions of Chemicals.” Risk Analysis, 2019. DOI: 10.1111/risa.13375.” doi.org
- PubMed. “Saleh R, Bearth A, Siegrist M. “Addressing Chemophobia: Informational versus affect-based approaches.” Food and Chemical Toxicology, 2020. DOI: 10.1016/j.fct.2020.111390.” doi.org