FDA Cosmetic Labeling Requirements: The 5 Elements (and Claims Substantiation)

Quick answer

FDA cosmetic labeling requirements are the rules that govern what must appear on a cosmetic sold in the United States. A compliant label generally needs five things: a product identity, the net quantity of contents, an ingredient declaration, the responsible party (name and address), and any required warning statements. On top of those, any performance claim you make should have claims substantiation — evidence on file that backs it up. As an independent K-beauty manufacturing advisor who has run 300+ SKUs through Korean factories, here's what each requirement means, and why labeling — not the formula — is one of the most common reasons a Korean-made product gets delayed at U.S. entry. This is general information, not legal advice.

The five core label requirements

Most cosmetic products sold in the U.S. are expected to carry these five elements. Get them right before artwork is finalized and you remove the most common pre-launch delay:

1. Product identity

The label has to make clear what the product actually is — “Moisturizing Cream,” “Facial Serum,” “Cleansing Foam.” A consumer should understand the nature of the product at a glance, not have to infer it from the brand styling.

2. Net quantity of contents

The package must state how much product is inside, formatted to U.S. expectations (U.S. customary units, typically with metric alongside — e.g. 1.69 fl oz / 50 mL). A Korean pack that shows only 50 mL often needs reformatting.

3. Ingredient declaration

Ingredients are listed using accepted INCI nomenclature, in descending order of predominance. This is one of the most heavily scrutinized parts of a label — and the place where marketing names cause rejections. Because that's its own deep topic, we cover it separately in INCI names vs marketing names.

4. Responsible party

The label identifies the company responsible for the product — name and business address. For an imported Korean product, this is usually the U.S. brand or importer, not the factory.

5. Warning statements

Where applicable, required cautionary statements must appear. Which ones apply depends on the product and its ingredients.

Why Korean packaging often fails U.S. labeling — even when the formula is fine

The most common reason isn't the product — it's the assumption that a label approved for Korea can simply be translated into English and used in the U.S. Korean and U.S. labeling requirements aren't identical, so a straight translation frequently leaves gaps: ingredient formatting that isn't INCI-correct, a net-contents statement in the wrong format, missing responsible-party details, or claim wording that reads differently to a U.S. regulator. The formula passes; the packaging is what sends you back to the printer. The expensive version of this is finalizing artwork before a compliance check — because fixing it afterward means re-doing print files and eating the delay.

Claims substantiation: the part brands underestimate

Beyond the five elements, anything your label claims the product does carries its own requirement: claims substantiation — keeping evidence on file that supports the statement. The strength of that evidence should match the boldness of the claim. Mild appearance claims need less; strong claims need more.

Why it matters for risk: many advertising disputes don't start with a lab — they start with how a consumer understood the label. If a reasonable buyer could read your packaging as promising something the product doesn't deliver, that's the territory of false or misleading advertising, regardless of intent. A few general patterns raise that risk:

• Structure/function language. Words that imply the product changes the body — “repairs,” “heals,” “stimulates collagen,” “reduces inflammation” — read very differently to a U.S. regulator than soft appearance wording. Terms used casually on Korean packaging can land much harder in English.
• An ingredient's name carrying a promise. If a hero ingredient is featured in the product name or front of pack, a consumer reasonably expects a meaningful amount of it — and expects it to do what's implied. If it's present only in trace amounts, or can't plausibly act that way in a topical product, the gap between expectation and reality is exactly what substantiation has to cover.
• Implied results. Before/after framing or outcome language invites the question “can you back this up?” — so the evidence needs to exist before the claim ships.

The safe habit: for every claim on the label, ask “what would I show if someone asked me to prove this?” If the answer is thin, soften the wording before production — not after a dispute. (General information, not legal advice; substantiation needs vary, so verify specifics for your product and market.)

The compliant workflow: review before artwork

The order of operations is what saves money. Run the label and claims check before you finalize packaging artwork, not after:

1. Formula development — settle what the product is.
2. Claims review — decide what you'll say, and confirm you can substantiate it.
3. Label compliance review — the five elements, formatted for the U.S.
4. Packaging artwork finalized — lock the print files only now.
5. Production — print and fill.

Brands that review compliance before artwork approval generally see fewer delays and lower revision costs than those that fix it later. The customs side of this — what happens if a label question surfaces at the border — is covered in MoCRA: the customs response.

Why an independent review helps

A factory focuses on production, a designer on aesthetics, a marketing team on conversion — none of them is positioned to pressure-test your label and claims from the buyer's side. An independent advisor isn't paid to place your order, so the review is on your side: checking whether the five elements are right and whether each claim is one you could actually stand behind, before print files are locked. The goal is to catch the revision on screen, not after 10,000 cartons are printed.

Related reading: INCI names vs marketing names, MoCRA and the customs response, and how cosmetics are manufactured.

Get a written label & claims review

Your five label elements and every claim on the pack are connected — one unsupported word can send the whole file back to the printer. Send your label copy, claims, and ingredient list, and get up to 3 connected questions answered in writing within 24 hours — $499.

Get a written label & claims review — $499

FAQ

What information must appear on a cosmetic label?

Typically five elements: product identity, net quantity of contents, ingredient declaration (INCI, descending order), responsible-party name and address, and any required warning statements. Performance claims additionally need substantiation on file.

Does the FDA require ingredient lists on cosmetics?

Most cosmetics sold in the U.S. are expected to carry an ingredient declaration using accepted INCI nomenclature in descending order of predominance. Marketing names in place of INCI names are a common cause of label rejection.

Can I use Korean cosmetic packaging in the United States?

Not always. A label approved for Korea may need changes — INCI-correct ingredient formatting, U.S. net-contents format, responsible-party details, and claim wording reviewed for U.S. expectations — before it's compliant.

What is claims substantiation?

It's the evidence kept on file to support a marketing or performance claim. The stronger or more medical-sounding the claim, the more substantiation it should have. Many advertising disputes hinge on how a consumer could reasonably understand the claim.

When should label compliance be reviewed?

Before packaging artwork is finalized. Reviewing claims and the five label elements before locking print files avoids re-doing artwork and the delays that come with it.