Ingredient basics: the map
An ingredient list becomes easier when you stop trying to memorize every name and start recognizing what job an ingredient is doing.
| Reading bucket | Examples | What it helps you notice |
|---|---|---|
| Targeted ingredients | Retinoids, niacinamide, exfoliating acids | Ingredients chosen for a specific cosmetic function |
| Humectants | Glycerin, hyaluronic acid, panthenol | Water-binding and hydration support |
| Emollients | Squalane, esters, oils, fatty alcohols | Softness, slip and skin feel |
| Occlusives | Petrolatum, some silicones and waxes | Reducing water loss from the surface |
| Formulation ingredients | Emulsifiers, thickeners, pH adjusters | How the product stays mixed and feels |
| Preservation | Phenoxyethanol and preservative systems | Microbial stability of water-containing products |
Why this map is deliberately approximate
Cosmetic ingredients can do more than one job. An emollient may also contribute to occlusion, and a solvent may change both delivery and sensory feel. Dermatology reviews of moisturizers describe humectancy, emolliency and occlusion as useful mechanisms, not as mutually exclusive boxes.
The six buckets here are therefore a shopping and label-reading framework. I checked the final version against recent moisturizer reviews and an INCI-reading review so the framework does not pretend to be an official classification.
Do not turn list order into a formula calculator
Ingredient order is useful, but only within its limits. Korean law generally requires descending order by amount, while allowing ingredients at 1% or less, fragrance and colorants to appear without strict descending order. An ingredient near the top is therefore more informative than one near the end, but neither position gives you a disclosed percentage by itself.
This is why the older advice to find a “one percent line” around carbomer or preservatives has been removed. The label does not mark that line.
The moisturizing part of the map has the strongest scientific footing
Humectants, emollients and occlusive materials are standard concepts in moisturizer literature. Their effects overlap, and finished formulas matter more than isolated ingredient labels, but the three mechanisms are useful for understanding why two moisturizers can feel and perform differently.
How to use the map in practice
Start with the question you actually have. If you are checking a functional claim, look for the relevant ingredients and the Korean regulatory context. If the issue is dryness, look at the moisturizing system as a whole. If the issue is fragrance sensitivity, search the full list for fragrance and designated allergen names instead of assuming the last five entries contain everything important.
The reader tool does the categorization mechanically. The map is here so the result still makes sense when you read it without the tool.
- PubMed: How to read an INCI list and basic formulation principles
- PubMed: Skin hydration and moisturizing ingredient mechanisms, 2026 review
- PubMed: The skin barrier and moisturization mechanisms
- Korea Cosmetics Act Enforcement Rule, ingredient order and exceptions
Frequently asked
Are there really six ingredient categories?
No official system says there are exactly six. inci.blue uses six broad buckets as a reading shortcut: targeted ingredients, humectants, emollients, occlusives, formulation ingredients and preservation.
Can I tell what a product does from the first five ingredients?
You can often learn about the base of a formula, but not every important ingredient must appear in the first five and list position is not an exact concentration.
What are humectants, emollients and occlusives?
They describe different moisturizing functions. Humectants support water retention, emollients improve softness and feel, and occlusive materials can reduce water loss.
Are preservatives always at the end?
Often they appear later because many are used at low levels, but ingredients at 1% or less can be listed out of strict descending order in Korea, so “the end” is not a precise concentration zone.
What is the fastest useful way to read a list?
Identify the formula base, look for ingredients relevant to your question, and use the label as context rather than trying to calculate percentages it does not disclose.