Two words in a definitions section. They decide the whole product.

Start where the rules start. For color additive purposes, federal regulation defines the area of the eye, and the definition reads: the area enclosed within the circumference of the supra-orbital ridge and the infra-orbital ridge, including the eyebrow, the skin below the eyebrow, the eyelids and the eyelashes, and the conjunctival sac of the eye, the eyeball, and the soft areolar tissue that lies within the perimeter of the infra-orbital ridge. The eyebrow is second on that list. It is not implied and it is not adjacent; it is named.¹ That matters because American cosmetics law is otherwise permissive to a degree that surprises people. A manufacturer may generally use any ingredient without asking anyone first. Color additives are the single exception written into the statute, and most of them must additionally be certified batch by batch, at forty-five cents a pound against a two-hundred-and-eighty-eight-dollar minimum, with a four-ounce sample of a batch mixed to uniform composition.²

Then comes the part that catches everyone. The prohibition on using a color near the eye is not written as a prohibition. No listing authorizes eye-area use unless the listing specifically provides for that use, and a color used there without such permission is treated as though it were never listed at all. We searched the full text of five parts of the code for the sentence the whole industry quotes - not for use in the area of the eye - and it appears zero times.³ Of the thirty-six certified color additives listed for cosmetics, six carry eye-area permission and thirty do not, and not one of those thirty is expressly forbidden. They are barred by silence.⁴ The trap inside the trap is the phrase cosmetics generally, which reads like the broadest grant available and is in fact narrower: a color approved for cosmetics generally has not been approved near the eye, and we counted twelve certified listings sitting in exactly that gap.⁵ Where a non-permitted color does get used, the chain runs in three steps - the listing does not provide for the use, so the color is deemed unlisted; an unlisted color additive is unsafe within the meaning of the statute; and a cosmetic bearing an unsafe color additive is adulterated.

Two further pieces of the code name this product almost exactly. In the listing taxonomy used for federal cosmetic product filings, category 03 is eye makeup preparations, and three of its subcategories name brow products: eyebrow pencils, eyelash and eyebrow preparations, and - code 03H - eyelash and eyebrow adhesives, glues, and sealants.⁶ And among the thirty-six certified colors, exactly one listing writes a brow product into its own text: D&C Black No. 2, which may color eyeliner, brush-on-brow, eye shadow, mascara, lipstick, blushers and rouge, makeup and foundation, and nail enamel.⁷ Colored brow products are also the one place the code has moved recently in the other direction. Since November 2021 exactly one color additive has been approved for dyeing the eyebrows and eyelashes: silver nitrate, at no more than four percent by weight, in a gel of specified viscosity, applied by a professional for no more than one minute and then immediately removed, not for anyone under sixteen, and not distributed or sold to consumers. A current agency page still says no color additive is approved for that use. The regulation has said otherwise for nearly five years, and where a guidance page and the codified rule disagree, the rule governs.⁸

The second regime is what a brand is allowed to say. The false advertising statute names cosmetics in its own text and has since 1938, and its definition of a false advertisement carves out labeling in two words - other than labeling - which is the entire jurisdictional boundary between the agency that polices the tube and the agency that polices the campaign.⁹ The standard those claims have to meet is older than most of the brands making them: an objective product claim needs a reasonable basis at the moment it is made, and evidence assembled afterward does not cure the violation. There is no rule in the code requiring substantiation; it is a reading of the deception statute that has been enforced case by case since a policy statement issued in 1984. The two-clinical-trial requirement people quote is real but binds particular companies under particular consent orders, not the industry under any rule.¹⁰ On the words this category actually uses: a non-toxic claim is read as covering humans and the environment together, so substantiating one half is not enough.¹¹ A free-of claim can be literally true and still deceptive - including when the substance was never associated with the product category in the first place, which is the most common free-of construction in beauty.¹² And clean has no federal definition at all, which is a different thing from being prohibited.

One instrument in this area has teeth of its own. Most of what governs a beauty claim is guidance, which informs rather than binds, with liability running through the deception statute. The consumer reviews and testimonials rule is a legislative rule, and a knowing violation carries a civil penalty of $53,088 per violation - a figure set in January 2025 and expressly carried forward unchanged for 2026 in a notice published four days before this page was written. It prohibits fake and misrepresented reviews, buying reviews for a particular sentiment, undisclosed insider reviews, company-controlled review sites, suppressing reviews by threat, and fake indicators of social media influence. It was not among the rules withdrawn in February 2026 to conform to adverse court rulings, and the agency brought a civil penalty action under it in May 2026.¹³

The third regime is the one a national launch actually trips over. The 2022 cosmetics statute is widely described as having federalized this area, and on process it did: facility registration, product listing, records, recalls, adverse event reporting, good manufacturing practice and safety substantiation are preempted subjects. But the very next subsection expressly preserves the power of a state to prohibit an ingredient or limit its amount, and to keep ingredient reporting requirements that predate the act.¹⁴ Process went national; composition did not. By our count eight states have a cosmetics ingredient restriction in force today, and because a count like that depends entirely on what you decide to include, we published our counting rule beside the number - five states if you require a multi-chemical ban rather than counting PFAS-only laws.¹⁵ Meanwhile several of the federal rulemakings the statute itself ordered have not appeared. There is no good manufacturing practice rule, proposed or final, against deadlines of December 2024 and December 2025. There is no fragrance allergen labeling rule, against a deadline of June 2024, which means there is no US fragrance allergen disclosure duty at all and anyone quoting a number of allergens a US label must carry is importing a European requirement. The talc testing rule was proposed in December 2024 and withdrawn in November 2025.¹⁶ What is fully live is registration and listing - and neither is an approval. The agency put that in writing ten days before this page: a registration or listing number does not indicate approval, and it issues no certificate and no confirming letter.¹⁷

Now the two things a buyer should know that do not flatter the name. The first is the trademark record, which is specific and public. L'Oreal filed THE BROW GLUE for eyebrow cosmetics in March 2020, drew a descriptiveness refusal, could not carry it, and amended to the Supplemental Register, where the mark registered in June 2021. It filed again in 2024 on a three-dimensional packaging configuration and took the Principal Register in April 2025 with the entire wording - THE BROW GLUE - disclaimed. The examining attorney's own sentence: brow glue is a product that helps eyebrows to stick together and stay in place, therefore the wording is descriptive of a feature of the goods. Neither refusal was on genericness, both were on descriptiveness, and we draw no conclusion whatever about whether anything is registrable, available or safe to use. That is counsel's work and this page is not a substitute for it.¹⁸ The second is that this category cannot be sized from public data. The manufacturing classification stops at a six-digit code whose definition never says eyebrow, eye makeup or makeup, and has no sub-industry beneath it; the finest tariff line puts mascara, shadow, liner, brow pencil and brow glue in one undifferentiated bucket. What can be said from federal sources is that all toilet preparation manufacturing in the United States recorded about $36.55 billion in shipments across 1,199 establishments and 50,886 employees in 2022 - and that no federal series measures what share of that is a brow product.¹⁹ A definition that names the eyebrow, a gate that six colors pass, a phrase the register has already called descriptive, and no way to size the market from public data. Somebody has to read all of that before building here, and that is the business this name is for.