Only one phrase commonly printed on a Korean skincare front panel has a statutory definition and a government reviewer behind it: 기능성화장품, functional cosmetic. Most of the rest — "dermatologist tested," "hypoallergenic," "non-comedogenic," "clinically proven," "pH balanced," "cruelty free," "clean beauty" — have no regulated definition in the United States, and in Korea they are governed not by a definition but by a different mechanism: a list of expressions a label may not use, plus a duty to hand over evidence within 15 days if the Ministry of Food and Drug Safety asks for it.
That distinction is the whole decoder. A US front panel is mostly unverified adjectives, because FDA states it "does not have a list of approved or accepted claims for cosmetics" and that cosmetic labeling does not need FDA approval before the product goes on the market (FDA, "Cruelty Free"/"Not Tested on Animals" Labeling on Cosmetics). A Korean-market front panel is a filtered document: certain words are simply not allowed, and certain words are allowed only if the company holds test data it can produce on demand under Article 14 of the Cosmetics Act (Korea Ministry of Government Legislation, easylaw: 표시·광고 내용의 실증).
This is a category and label guide, not a product test. Glow Seoul Skin has performed no wear trials and no clinical evaluation of any product or format described below. Every factual claim is attributed to a regulator, a standards body, a medical association, peer-reviewed literature, or a manufacturer’s own published page. Nothing is asserted on our own authority.
Below, eight claims are ranked from most to least guaranteed, each with three answers: is there a regulated definition, who verifies it, and what to read instead.
This decoder is compiled from primary regulatory sources, dermatology-association guidance, and peer-reviewed literature, all linked inline. Regulations change and this is not legal advice; the linked originals govern. Where a term's status could not be verified, that is stated rather than guessed.
The one-screen summary
| Claim | Regulated definition? | Who verifies | Read this instead |
|---|---|---|---|
| 기능성화장품 / functional cosmetic | Yes, statutory (Korea) | MFDS, via review or a filed report before sale | Which function was approved, and the SPF/PA or active it applies to |
| Cruelty free | No legal definition (US); Korea bans selling animal-tested cosmetics, with exceptions | Nobody by default; third-party certifiers by contract | A named certifier with a fixed cut-off date and supplier auditing |
| Clinically proven / clinically tested | No pre-approval; substantiation duties only | FTC on challenge (US); MFDS on request within 15 days (Korea) | The study design, the number, and what was measured |
| Dermatologist tested / 피부과 테스트 완료 | No defined protocol; in Korea it is an explicit substantiation target | The company's own lab; MFDS only if it asks | What was tested, on how many people, and the result |
| Non-comedogenic | No standardized test | Nobody | Full ingredient list; your own history with the formula |
| Hypoallergenic | No federal standard (US) | Nobody | Ingredient list, fragrance and botanical content |
| Clean beauty | None found in either jurisdiction | Nobody | The brand's published exclusion list, then the INCI list |
| pH balanced | None found in either jurisdiction | Nobody | An actual stated pH number |
1. 기능성화장품 (functional cosmetic) — the only claim with a government reviewer
This is the strongest claim on any Korean label, and the one most shoppers ignore.
Korean law splits cosmetics into general cosmetics and functional cosmetics. A functional cosmetic may only be sold after it has either passed an MFDS examination or filed a report, and the submission includes safety data (toxicity, irritation, sensitization, photoreactivity, patch testing) and efficacy data including human application studies (easylaw: 기능성화장품 심사와 보고서 제출).
The recognized functions are a closed list, and they are specific: melanin-suppression and melanin-color-reduction whitening, skin elasticity and wrinkle improvement, gentle tanning, UV protection by blocking or scattering, hair color change, hair removal, relief of hair-loss symptoms, relief for acne-prone skin in cleansing products, barrier recovery for itch relief, and reduction in the appearance of stretch marks (easylaw, same source).
What it guarantees: that this specific claim, on this specific formula, was submitted to a regulator before sale.
What it does not guarantee: anything outside the reviewed function. And the boundary is enforced. MFDS's labeling guideline lists, as prohibited expressions, use of 미백 (whitening), 화이트닝, 주름(wrinkle) 개선, or 자외선(UV) 차단 language on a product that has not been reviewed or reported, as well as any labeling or advertising that departs from the review result or exceeds the reviewed scope (MFDS, 화장품 표시·광고 관리 지침, Aug 14, 2025, 별표 1).
Read instead: which function is named, and the numbers attached to it. For sunscreen, Korea's labeling convention is SPF written numerically up to 50 and "SPF 50+" above that, with PA grades from PA+ to PA++++ where more plus signs mean stronger UVA protection; the same government release notes that above SPF 50 the real difference in protection is not large (Korea.kr, 자외선차단제 올바른 사용법).
One cross-border note worth holding onto: the same sunscreen is a different legal object in each market. In Korea it is a functional cosmetic. In the United States it is an over-the-counter drug, and FDA's sunscreen drug rules reach any cosmetic or moisturizer bearing an SPF value (FDA, Labeling and Effectiveness Testing: Sunscreen Drug Products for OTC Human Use).
2. Cruelty free — the phrase guarantees nothing; the jurisdiction and the certifier can
FDA is unusually blunt here. There are no legal definitions for "cruelty free" or "not tested on animals," and the agency explains the loophole in the same breath: some companies apply the claim only to the finished product while relying on raw-material suppliers or contract laboratories for any animal testing needed to substantiate safety, and many raw materials in cosmetics were tested on animals years ago when they were introduced (FDA, "Cruelty Free"/"Not Tested on Animals" Labeling on Cosmetics).
Korea supplies something the phrase does not: a prohibition. Under Article 15-2 of the Cosmetics Act, responsible distributors and custom-cosmetics sellers may not distribute or sell cosmetics that have undergone animal testing, or cosmetics manufactured or imported using animal-tested raw materials, subject to defined exceptions; violations carry administrative fines (easylaw: 제조·수입·판매 등이 금지되는 화장품).
Third-party certification is the other substitute for a definition. The Leaping Bunny standard requires a fixed cut-off date after which neither the brand nor its suppliers or manufacturers may conduct, commission, or be party to animal tests; a documented supplier monitoring system; and openness to independent audits (Leaping Bunny, The Corporate Standard of Compassion for Animals).
Read instead: a named certifier and its standard, not a bunny drawn on a carton. Absent that, the words are self-declared.
3. Clinically proven — a substantiation duty, not a pre-approval
No agency clears a "clinically proven" cosmetic claim before it appears on a package. What exists is the obligation to be able to back it up afterwards, and the two markets impose that obligation differently.
United States. The FTC's Health Products Compliance Guidance sets the standard for health-related advertising claims: substantiation by "competent and reliable scientific evidence," generally randomized, controlled human clinical testing conducted by experts in the relevant condition or function, with the amount and type depending on the claim, and with animal and in vitro studies alone insufficient to support health-related representations (FTC, Health Products Compliance Guidance). Separately, MoCRA now requires the responsible person for a cosmetic to ensure, and keep records supporting, adequate substantiation of safety (FDA, Modernization of Cosmetics Regulation Act of 2022). Note the word: safety, not efficacy. MoCRA did not make "clinically proven to firm skin in two weeks" a reviewed claim.
Korea. Article 14 of the Cosmetics Act requires businesses to be able to substantiate the factual content of their own labeling and advertising, and when MFDS requests the evidence it must be submitted within 15 days, with extension only for good cause; substantiation means human application study data, in-vitro data, or equivalent-or-better research, or consumer and expert surveys whose sampling, questions, and method match the stated purpose and statistics (easylaw, 표시·광고 내용의 실증). MFDS's guideline names exactly the claim shapes that trigger a request, including numeric efficacy claims — its worked examples are "수분감 30% 개선 효과" (30% improvement in hydration), "피부결 20% 개선," and "2주 경과 후 피부톤 개선" — each requiring human application or in-vitro test data. Comparative claims such as "5 times longer lasting than product OO" require the same (MFDS, 화장품 표시·광고 관리 지침, 별표 2).
Read instead: the study behind the number. A claim like "94% of participants agreed" is a consumer survey, not a clinical measurement; "measured by corneometer in 22 subjects over 4 weeks" is a measurement with a sample size you can weigh. If neither appears anywhere on the package, the site, or the brand's technical page, treat the phrase as advertising copy that has not yet been asked to prove itself.
4. Dermatologist tested — a test happened; the result is not on the label
There is no defined protocol behind the English phrase. It does not name a test, a sample size, a pass threshold, or who read the outcome, and FDA neither defines it nor maintains a list of approved cosmetic claims (FDA, Cosmetics Labeling Claims).
Korea is the more interesting jurisdiction, because the Korean equivalent is treated as a factual assertion. MFDS lists "피부과 테스트 완료" ("dermatological testing completed") explicitly among the main substantiation targets, in the row covering test-and-inspection expressions, and requires it to be backed by human application study data or in-vitro test data (MFDS, 화장품 표시·광고 관리 지침, 별표 2). MFDS's notification on substantiation defines a human application study as a study conducted on people to confirm a cosmetic's effect and safety for the purpose of proving labeling and advertising content, with erythema and edema graded by a dermatologist or an equivalently qualified assessor (MFDS notification, 화장품 표시·광고 실증에 관한 규정).
So in the Korean market the phrase means something narrow and real: a study of that type exists, and MFDS can demand it. It still does not mean a dermatologist recommends the product, that the panel resembled you, or that nobody reacted.
The adjacent claims are where Korea draws a hard line. MFDS's prohibited-expression table bars, among others: "OO 아토피 협회 인증 화장품," "OO 의료기관의 첨단기술의 정수가 탄생시킨 화장품," "OO 대학교 출신 의사가 공동 개발한 화장품," "OO 의사가 개발한 화장품," "OO 병원에서 추천하는 안전한 화장품," and the family 병원용, 병원전용, 피부과전용, 피부과시술용, 약국용, 약국전용 화장품 (hospital-only, dermatology-clinic-only, pharmacy-only). Words implying a medicine are barred too: 메디슨(medicine), 드럭(drug), 코스메슈티컬, 치유 (MFDS, 지침, 별표 1).
Read instead: any published detail of the test — protocol, panel size, duration, and result. A brand that ran a real study can usually name it. And note the asymmetry: "tested" describes an activity, while "no participants showed irritation in a 4-week study of 30 subjects" describes an outcome.
5. Non-comedogenic — a claim with no standardized test
"Non-comedogenic" is a prediction about pore-clogging that no regulator defines and no standard body certifies. A 2025 clinical review in JAAD Reviews addresses the situation in its own title: Comedogenicity in cosmeceuticals: A review of clinical relevance, regulatory gaps, and future directions (JAAD Reviews).
The methodological problem is older than the marketing. In 2006, Draelos and DiNardo re-examined the comedogenicity concept in the Journal of the American Academy of Dermatology, testing finished cosmetic products using a modification of the Mills and Kligman human assay in subjects with prominent follicular orifices who form comedones, rather than relying on the conventional ingredient-based rabbit-ear model (Draelos & DiNardo, A re-evaluation of the comedogenicity concept, JAAD 2006;54:507-512). The practical upshot for a shopper: an ingredient's reputation, tested in isolation and at high concentration, is a poor predictor of how a finished formula behaves on human skin.
Korea's nearest regulated equivalent is narrower and better defined than the English phrase. "여드름성 피부에 사용에 적합" ("suitable for use on acne-prone skin") is listed as a substantiation target requiring human application study data, and 여드름 (acne) claims are otherwise prohibited unless they fall within a reviewed or reported functional-cosmetic efficacy (MFDS, 지침, 별표 1 and 별표 2).
Read instead: the ingredient list and your own history. If a specific formula has broken you out before, its "non-comedogenic" stamp is not evidence against your own record.
6. Hypoallergenic — the clearest case of a word meaning nothing in law
FDA's position has been stable for decades: there are no federal standards or definitions governing the term, it means whatever a particular company wants it to mean, and manufacturers of cosmetics labeled hypoallergenic are not required to submit substantiation of the claim to FDA. The agency adds that there is no such thing as a "nonallergenic" cosmetic, meaning one guaranteed never to produce an allergic reaction (FDA, "Hypoallergenic" Cosmetics).
The peer-reviewed check on that gap is worth memorizing. In a study of 174 best-selling moisturizers published in JAMA Dermatology, among products claiming to be "hypoallergenic," 83% (15 of 18) contained at least one ingredient from the North American Contact Dermatitis Group screening series; among products claiming to be "fragrance free," 45% (18 of 40) contained at least one fragrance or botanical cross-reactor ingredient (Xu S, Kwa M, Lohman ME, Evers-Meltzer R, Silverberg JI. JAMA Dermatol. 2017;153(11):1099-1105).
In the Korean market, the neighboring medical claim is banned outright: 항알레르기 (anti-allergy) appears on MFDS's prohibited-expression list alongside 아토피, 살균·소독, 항염·진통, 면역 강화, and 기저귀 발진 (MFDS, 지침, 별표 1). A Korean rule specifically defining or governing 저알레르기성 / "hypoallergenic" as such could not be verified for this guide, and the term does not appear in either the prohibited-expression table or the substantiation table of the current guideline.
Read instead: the ingredient list, with attention to fragrance, botanical extracts, and preservatives. For an established contact allergy, the ingredient name you personally react to is the only decision-relevant fact on the package.
7. Clean beauty — a marketing category, not a regulatory one
No regulatory definition of "clean beauty" could be identified in either jurisdiction: the term appears in neither of MFDS's prohibited-expression or substantiation tables, nor among FDA's labeling-claim topics. Its two most common component words are also undefined by FDA: "organic" is not defined in the FD&C Act, the Fair Packaging and Labeling Act, or FDA's regulations, and FDA has not established a regulatory definition of "natural" for cosmetic labeling. Where "organic" does mean something, it is USDA's National Organic Program, which defines organic for agricultural ingredients and sets labeling standards based on the percentage of organic content — so a cosmetic making an organic claim has to satisfy USDA for the claim and FDA for cosmetic labeling and safety (FDA, "Organic" Cosmetics).
Korea is stricter than either, in two specific ways.
First, natural and organic are certifiable statuses, not adjectives. MFDS may certify 천연화장품 and 유기농화장품 against standards it sets, and applications go to designated certification bodies (easylaw: 천연·유기농화장품 인증 및 표시방법). Using 천연(Natural) or 유기농(organic) language on a product that does not conform to the applicable guidance is listed as a prohibited expression, and if a brand instead labels an ISO 16128 natural or organic index, the guideline requires an accompanying disclaimer — on the front panel, "천연화장품(유기농화장품) 아님" ("not a natural/organic cosmetic"), or elsewhere, a statement that a simple ISO 16128 calculation does not mean the product qualifies as one (MFDS, 지침, 주의사항 and 별표 2).
Second, "free from" is not a free pass. Claiming a product does not contain a prohibited raw material — including 무첨가 and "free" phrasing, with the guideline's own examples 無(무) 스테로이드 and 無(무) 벤조피렌 — is itself a prohibited expression, and any surviving "무(無) OO" claim must be proved with analytical test data (MFDS, 지침, 별표 1 and 별표 2).
Read instead: the brand's published exclusion list, which tells you what "clean" means to that company, then the INCI list, which tells you what is actually in the bottle. Both are checkable; the word is not.
8. pH balanced — the weakest claim on this list
No regulatory definition of "pH balanced" could be located in FDA's cosmetic labeling-claim material or in MFDS's labeling guideline; the phrase appears in neither the prohibited-expression table nor the substantiation table. Balanced against what is left to the reader.
The reference point that exists is physiological, not regulatory. In a multicentre study of 330 volunteers, forearm skin surface pH averaged 5.12 before and 4.93 after refraining from showering and cosmetic application for 24 hours, from which the authors estimated the "natural" skin surface pH to be on average about 4.7 (Lambers H, Piessens S, Bloem A, Pronk H, Finkel P. Natural skin surface pH is on average below 5. Int J Cosmet Sci. 2006;28(5):359-370).
Read instead: a number. Some brands publish the measured pH of a cleanser or toner; that figure is comparable across products, and "pH balanced" is not.
Claims a Korean-market label may not make at all
This list is more useful than any positive claim, because it tells you what a compliant label is prevented from promising. All items are drawn from the prohibited-expression tables of MFDS's 화장품 표시·광고 관리 지침 (Aug 14, 2025), keyed to Article 13 of the Cosmetics Act.
| Category | Examples of prohibited expressions | Note |
|---|---|---|
| Disease or medical efficacy | 아토피, 건선, 소양증, 모낭충, 살균·소독, 항염·진통, 해독, 항암, 항진균·항바이러스, 면역 강화, 항알레르기, 기저귀 발진 | Cosmetics may not claim to diagnose, treat, relieve, or prevent disease |
| Conditional skin claims | 여드름; 기미, 주근깨; 항균 | Allowed only within a reviewed functional efficacy or a listed substantiation item |
| Skin-repair claims | 피부 독소를 제거한다(디톡스), 상처로 인한 반흔 제거, 홍조·홍반 개선, 뾰루지 개선, 흉터 흔적 제거 | Itch relief is narrowly excepted for temporary relief of dryness-related itch through moisturization |
| Physiological activity | 혈액순환, 피부재생, 세포 재생, 세포 활력 증가, 유전자(DNA) 활성화, 땀 발생 억제 | |
| Body-modification | 다이어트, 체중감량, 피하지방 분해, 체형변화, 가슴 확대, 얼굴 크기가 작아진다 | "얼굴 윤곽개선, V라인" excepted only when clearly presented as a makeup effect |
| Procedure and drug words | 보톡스, 필러, 레이저·카복시 시술 관련 표현, 메디슨(medicine), 드럭(drug), 코스메슈티컬, 치유 | |
| Endorsement and exclusivity | 병원용·병원전용·피부과전용·피부과시술용·약국용 화장품, OO 의사가 개발한 화장품, OO 협회 인증 화장품 | |
| Human-derived ingredient hype | 줄기세포 화장품, stem cell, 엑소좀 화장품 phrasing implying human-derived content | Plant or non-human sources excepted, e.g. 우유 엑소좀, 식물 엑소좀 |
| Age arithmetic | 피부나이 10년 감소, 피부나이 5세 어려짐, 피부나이 -3살 | Skin-age index may not be expressed in years |
| Approval implication | "동 제품은 식품의약품안전처 허가, 인증을 받은 제품임" | Excepted only for genuine functional-cosmetic review or report |
The guideline also notes that the same restrictions apply to equivalent expressions in English or other languages, and that an overall advertising impression can be judged prohibited even when no single word is (MFDS, 지침, 주의사항).
How to read a front panel in about a minute
- Look for 기능성화장품 and the named function. This is the only phrase with a reviewer behind it. If a product promises whitening, wrinkle improvement, or UV protection without it, the claim has not been through the system (easylaw; MFDS 지침).
- For sunscreen, read the SPF and PA notation, then decide about application. SPF numerically to 50 then "SPF 50+", PA+ through PA++++ (Korea.kr).
- Convert every adjective into a question about evidence. "Clinically proven" invites: which study, how many people, measuring what (FTC; MFDS 별표 2).
- Treat "tested" as an activity, not a result. "피부과 테스트 완료" means a study of that type should exist, not that it turned out well (MFDS 별표 2).
- Ignore "hypoallergenic" and read the ingredients. No federal standard exists, and 83% of hypoallergenic-labeled moisturizers in one JAMA Dermatology sample contained a screening-series allergen (FDA; Xu et al. 2017).
- Ignore "non-comedogenic" and trust your own record with the formula (JAAD Reviews 2025; Draelos & DiNardo 2006).
- Ask "clean according to whom" and go find the exclusion list (FDA; MFDS 지침).
- Ask "pH balanced to what number" (Lambers et al. 2006).
What could not be verified
Stated openly, because an unsourced regulatory assertion is worse than an admitted gap:
- "pH balanced": no defining rule found in either FDA's cosmetic labeling-claim material or MFDS's labeling guideline. Absence of a rule in these two sources is not proof that no rule exists anywhere.
- "Clean beauty": no regulatory definition found in either jurisdiction.
- "Hypoallergenic" in Korea: 항알레르기 is prohibited, but no rule specifically defining or governing 저알레르기성 was located in the current MFDS guideline's tables.
- "Dermatologist tested" in the US: no US definition or protocol found; the Korean substantiation requirement does not transfer to a US-market label.
- PA grade numeric thresholds: the Korean government source used here confirms the PA+ to PA++++ scale and its direction but does not publish the underlying protection-factor bands, so no numeric cut-offs are asserted in this guide.
FAQ
Does "dermatologist tested" mean a dermatologist recommends the product?
No. It describes that testing occurred, not who endorses the result. In Korea, "피부과 테스트 완료" is a claim MFDS can require a company to substantiate with human application or in-vitro data (MFDS, 지침, 별표 2), while endorsement-style phrasing such as "OO 의사가 개발한 화장품" or "피부과전용 화장품" is prohibited outright (MFDS, 지침, 별표 1).
Is "hypoallergenic" regulated anywhere?
Not in the United States. FDA states there are no federal standards or definitions for the term and that manufacturers need not submit substantiation for it (FDA). In Korea the related medical phrasing 항알레르기 is a prohibited expression; a specific rule for 저알레르기성 was not found in the current guideline.
If a Korean product says 기능성화장품, is everything on the label approved?
No. Only the reviewed or reported function is. Labeling that departs from the review result, or that extends beyond the reviewed scope, is prohibited (MFDS, 지침, 별표 1), which means the marketing sentences surrounding the approved function are still ordinary claims.
What happens if a brand cannot back up a claim in Korea?
Under Article 14, MFDS can require the substantiation data and the business must submit it within 15 days, with extension only for good cause; failure leads to an order to stop the labeling or advertising, and violations carry penalties of up to one year's imprisonment or a fine of up to 10 million won (easylaw: 표시·광고 내용의 실증).
Does "cruelty free" mean no animal was ever used for any ingredient?
Not necessarily. FDA notes that companies may apply the claim to the finished product while suppliers or contract labs perform animal testing, and that many raw materials were tested on animals when first introduced (FDA). A certifier standard with a fixed cut-off date and supplier monitoring, such as Leaping Bunny's, is what turns the phrase into a verifiable commitment (Leaping Bunny).
Are "clinically proven" claims checked before a product goes on sale?
No. In the US, cosmetic labeling does not require FDA approval before market, MoCRA's substantiation duty covers safety records rather than efficacy, and the FTC's evidence standard applies to advertising after the fact (FDA MoCRA; FTC). In Korea, substantiation is likewise triggered on request, not before sale (easylaw).
The bottom line
Rank the front panel before you rank the product. 기능성화장품 with a named function is the only phrase on a Korean skincare label that a regulator looked at before you did, and for sunscreen it comes with notation — SPF, PA — that is comparable between products. Everything below it on this list is either a substantiation duty that nobody has yet invoked, or an adjective with no definition at all.
The practical rule that follows: buy the reviewed function, and buy everything else off the ingredient list.