Korean product labels lean hard on ingredient names, and the packaging rarely explains them. Here is what the most common ones are, in plain language, along with what manufacturers typically position them for.
We have kept the descriptions deliberately careful. Skincare ingredients behave differently on different skin, and marketing copy tends to overstate certainty.
Niacinamide
A form of vitamin B3, found in a large share of Korean serums. It is commonly included in products aimed at uneven tone, visible pores and general dullness. It is usually well tolerated, though a minority of people find higher concentrations irritating — starting with a lower percentage is the sensible approach.
Centella asiatica
Also sold as cica, madecassoside or “tiger grass”. It appears in creams and moisturisers marketed for calming and comfort, and it is one of the more popular choices for skin that reacts easily. Many of the products built around it use short ingredient lists, which is itself useful when your skin is unhappy and you are trying to work out why.
Hyaluronic acid
A humectant — it holds water. Products often list several molecular sizes on the assumption that they behave differently in the skin. The practical note: humectants work best on damp skin with a moisturiser applied over the top. On bare skin in dry air, hydration can evaporate rather than stay put.
Snail secretion filtrate
The famous one. It is a filtered mucin used in essences and creams positioned for barrier support and post-blemish marks. Texturally it is slippery and slightly tacky, which people either love or immediately dislike. Vegetarian and vegan customers usually want to know it is animal-derived, so it is worth flagging.
Propolis
A bee-derived resin used in glow-oriented serums, often paired with niacinamide. Anyone with a bee-product allergy should avoid it.
AHA, BHA and PHA
Exfoliating acids. AHAs are water-soluble and work on the surface; BHA (salicylic acid) is oil-soluble and is the usual choice for congested pores; PHAs have larger molecules and are generally marketed as the gentler option.
Acids are where beginners get into trouble. Once or twice a week is plenty to start, always at night, and always with sunscreen the next morning.
Reading a label without the marketing
- Ingredients are listed by descending concentration, so anything after the preservatives is present in a small amount.
- “77% heartleaf” or “96% snail” refers to how much of the formula that one ingredient makes up — it is not a strength rating.
- A short ingredient list is not automatically better, but it does make it easier to identify what irritated you.
Skincare is personal. Nothing here is medical advice — patch test anything new on your inner arm for a day or two, introduce one product at a time, and see a dermatologist for persistent or painful skin problems.
