Korea has a reputation for strict, detailed cosmetic regulation, and that reputation is mostly earned. But "strict" and "comprehensive" are not the same thing. A market can regulate an ingredient tightly while another market regulates a completely different set of ingredients that the first one leaves alone.
We queried our database of 21,796 ingredients across 10 markets, looking for the gaps — ingredients that carry a regulatory entry in at least one market but none in Korea. There are 319 of them. Some are restricted in six or seven markets at once, and still absent from the Korean entries in our data. The pattern is worth understanding for anyone assuming Korean compliance is a superset of everyone else's.
The headline: 319 ingredients regulated elsewhere, not in Korea's entries
Of the ingredients in our database that carry a regulatory entry somewhere, 319 have one in at least one of the other nine markets but not in Korea. That does not mean these ingredients are unregulated in Korea in every legal sense — a substance can be covered by a general rule, a different framework, or a labeling requirement that our ingredient-level data does not capture. It means that in the structured, ingredient-by-ingredient regulatory data we compile, these 319 have entries for other markets and a blank for Korea.
That number sits alongside a smaller one going the other way: 22 ingredients carry a Korea-only entry, regulated in Korea and nowhere else in our data. So Korea is not uniquely permissive or uniquely strict. It regulates its own particular set, and so does everyone else.
Who regulates the most on their own
Counting the ingredients each market regulates alone — an entry in that market and no other — produces a clear ranking of regulatory independence.
| Market | Solo-regulated ingredients |
|---|---|
| EU | 85 |
| Japan | 31 |
| Canada | 26 |
| Korea | 22 |
| Taiwan | 9 |
| China | 1 |
| ASEAN | 1 |
The EU regulates far more ingredients on its own than anyone else — 85, more than Japan and Canada combined. That fits its role as the market that most often moves first, a pattern we have seen across individual ingredients. Korea sits fourth at 22. It has its own regulatory priorities, but it is not the outlier that the "strictest market" reputation might suggest.
What sits in the Korean gap
The 319 ingredients regulated elsewhere but not in Korea's entries are a mixed group. A few examples that carry entries in six or more other markets:
| Ingredient | Type | Regulated in |
|---|---|---|
| Hydrolyzed Hair Keratin | Protein derivative | EU, China, Taiwan, ASEAN, Brazil, Argentina, Canada |
| Butane | Aerosol propellant | EU, China, ASEAN, Brazil, Argentina, Canada |
| Benzophenone-5 | UV filter | EU, Japan, China, ASEAN, Brazil, Argentina |
| Silver Chloride | Antimicrobial | EU, China, Taiwan, ASEAN, Brazil, Argentina |
| Aluminum Hydroxide | Various | EU, China, Taiwan, ASEAN, Brazil, Argentina |
Several of these are worth a formulator's attention. Butane, a common aerosol propellant, is prohibited or restricted in six markets in our data but carries no Korean entry. Benzophenone-5, a UV filter, is restricted in six markets. Hydrolyzed hair keratin, a protein used in hair products, is prohibited in seven. In each case, a formula built to Korean requirements alone would need review before entering those other markets.
The reverse is the practical risk. A brand that treats Korean compliance as the strictest possible bar, and assumes clearing it means clearing everywhere, would ship these ingredients straight into markets that restrict them.
The 22 Korea regulates alone
Going the other direction, 22 ingredients carry a Korea-only entry in our data. The list is a mix of fragrance components (limonene), a vitamin (tocopherol, capped at 20%), colorants, and a few prohibited entries. Some of these are regulated elsewhere too but through a different mechanism — limonene, for instance, is a declarable fragrance allergen in the EU, which our ingredient-level data records differently from a concentration limit. That is exactly why the "Korea-only" label needs care: it means only that our structured data shows a Korean entry and no matching entry for the same ingredient elsewhere, not that no other country addresses the substance at all.
What this means in practice
The useful conclusion is not that one market is lax and another is strict. It is that regulatory coverage does not nest neatly. No single market's rulebook is a superset of the others, so "compliant in the strictest market" is not a real category. A formula cleared in Korea can still contain an ingredient restricted in six other markets, and a formula built to EU standards can still miss something Korea regulates on its own.
For a company selling across borders, the only reliable approach is per-market screening. The 319-ingredient gap is a concrete measure of why: it is the number of ways a Korea-only check could miss a restriction that applies where you are actually shipping.
What the data does not show
Our database records ingredient-level regulatory entries — concentration limits, prohibitions, and product-type conditions — not every legal instrument in each market. An ingredient with no Korean entry in our data may still be covered by a general provision, a labeling rule, or a framework outside the ingredient annexes we track. The "319" and "22" figures are counts within this structured data, not a claim about the full legal status of each substance in each country.
The comparison also depends on how each market publishes its rules. Markets that regulate through positive lists, or that fold ingredients into category-wide rules rather than individual entries, can appear to have fewer solo entries than their actual scrutiny warrants. And regulations change constantly. These counts reflect our database at the time of writing.
Methodology and Sources
Ingredient and regulatory data: K-Beauty Cosmetic Ingredients database, 21,796 ingredients across 10 markets — the EU, Korea, Japan, China, Taiwan, ASEAN, Brazil, Argentina, Canada, and the US. For each ingredient with at least one regulatory entry, we counted the markets holding an entry and identified those with an entry in some markets but not Korea (319), those with a Korea-only entry (22), and the count of solo-regulated ingredients per market.
"Regulated" here means the presence of an ingredient-level entry — a prohibition, concentration limit, or product-type restriction — in our structured data. It does not capture every labeling requirement or general legal provision, so a blank for one market is an absence of a matching structured entry, not proof that the market does not address the substance at all.
For how these systems differ on individual ingredients, see Banned in Europe, Legal in Korea and our 10-country restriction count. For the underlying data, see K-Beauty Cosmetic Ingredients on RapidAPI.
Important Notice: This article is for informational purposes only. It is not legal, regulatory, or medical advice. Cosmetic regulations change and vary by market, and the ingredient-level data here does not capture every legal provision in each country. Anyone making compliance or formulation decisions should consult the current text of the relevant regulation and a qualified professional. For full terms, see our Disclaimer.
Decoded Korea publishes data-driven analysis of Korean cosmetic ingredients, chemical regulations, and safety data.
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