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ECF Skin Barrier Cream Toner$23.52AC Collection Calming Liquid Mild
A mild daily exfoliating liquid on a green tea leaf water base, with betaine salicylate and gluconolactone for gentle sebum and texture care.
No reviews yet125ml
$16.79 per 100 ml
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- DryDehydratedSensitiveCompromised barrier
- Helps with
- DehydrationBarrier weaknessEarly environmental damageRough surface texture
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$23.52
MAXCLINIC Pro Hyaluron Toner 320mlMAXCLINIC
$65.00
$22.50
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How it works
A daily exfoliating liquid is a milder thing than a peel: it goes in the toner step and works a little at a time rather than all at once. This one is built on camellia sinensis leaf water and carries betaine salicylate and gluconolactone, with panthenol, allantoin and asiaticoside behind them. It goes on after cleansing in the evening, in place of the toner step, and moisturizer follows once it has settled. Blemish-prone skin that reacts badly to a strong scrub is the case it fits. Start at three or four evenings a week rather than nightly, and keep any other acid out of the same routine.
How to use
- Use the AC Collection Calming Liquid Mild after cleansing in the evening, in place of your toner step.
- Sweep it over the face with a cotton pad or press it in with your palms, keeping clear of the eye area.
- Wait a minute, then follow with serum and moisturizer the same evening.
- Start at three evenings a week and build up. Do not use it alongside another exfoliating acid or a retinoid in the same routine.
COSRX AC Collection Calming Liquid Mild
What is the AC Collection Calming Liquid Mild formulated for?
This liquid opens on green tea leaf water rather than plain water, with betaine salicylate sitting sixth on the list for a mild, BHA-style approach to congested, blemish-prone skin. Gluconolactone follows shortly after as a gentler polishing ingredient, while panthenol, allantoin, and tea tree leaf oil sit further down to keep things calm. It reads as a mild daily liquid for oil and texture control rather than a strong spot treatment.
Is 'Mild' in the name accurate for reactive or blemish-prone skin?
There is no added fragrance, denatured alcohol, silicone, or sulfate surfactant on the ingredient list, and betaine salicylate sits well down the list rather than at the top, which supports the mild positioning. Tea tree leaf oil is present but appears further down the formula, not as a leading ingredient. Reactive and blemish-prone skin often does well with this kind of lower-concentration approach, but a patch test is still the right first step for any new leave-on liquid.
How soon will breakouts or oiliness improve with regular use?
Betaine salicylate and gluconolactone both work through accumulated use rather than a single application, gradually addressing the buildup that contributes to congestion and shine over repeated applications. Expect changes in oiliness and clarity to emerge over several weeks of consistent evening use rather than a rapid turnaround. Using it on and off will simply stretch that timeline rather than speed anything up.
Can I pair this with a spot treatment or moisturizer at night?
Yes, this liquid is positioned as a toner-stage step, applied after cleansing and before a moisturizer, and there is no additional heavy occlusive ingredient here that would block a follow-up product. If you use a separate spot treatment with a stronger active, introduce the two on alternating nights at first rather than layering both immediately. Panthenol and allantoin in the base are there to keep the skin comfortable underneath whatever comes next.
How do I check that my bottle is genuinely the Korean-market version?
COSRX built its own verification system rather than relying on any seller's claim: the batch number and expiration date printed on your actual unit get entered into the checker on cosrx.com. Take those numbers off the physical package, not from any product description, since that independence is the point of the system. This bottle's EAN is 8809598450141, its original Korean-market barcode.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (18): Camellia Sinensis Leaf Water, Butylene Glycol, Dimethyl Sulfone, Betaine, 1,2-Hexanediol, Betaine Salicylate, Gluconolactone, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate, Glycerin, Panthenol, Allantoin, Arginine, Sodium Hyaluronate, Melaleuca Alternifolia (Tea Tree) Leaf Oil, Asiaticoside, Asiatic Acid, Madecassic Acid
Ingredient list read from cosrx.com on 18 August 2026.
18 of 18 explained
- Camellia Sinensis Leaf Water plant extract
- Camellia Sinensis Leaf Water is green tea distillate used in place of plain water as a base. It is far more dilute than the extract, so it sets the base rather than supplying the antioxidants.
- Butylene Glycol humectant
- Butylene Glycol is a small glycol that does two jobs at once: it holds water in the top layer of skin and it dissolves plant extracts and actives that plain water cannot. It also thins a formula, which is why watery Korean essences lean on it.
- Dimethyl Sulfone solvent
- Dimethyl Sulfone is MSM, an organic sulfur compound that dissolves in water. It is used as a conditioning ingredient and as a carrier for other actives.
- Betaine humectant
- Betaine is a sugar-beet-derived humectant that cells use to hold water. In a formula it hydrates and takes the edge off cleansers and acids, which is why it often appears alongside them.
- 1,2-Hexanediol humectant
- 1,2-Hexanediol is a glycol used for two reasons: it holds water like glycerin, and it makes a formula harder for microbes to live in, so less traditional preservative is needed. Korean formulas use it heavily for that second reason.
- Betaine Salicylate exfoliant
- Betaine Salicylate is a gentler salicylic derivative. Korean formulas use it at around 2 to 4 percent, which is roughly comparable to a low-strength salicylic acid, and it is easier on the skin barrier.
- Gluconolactone exfoliant
- Gluconolactone is a PHA, the gentlest exfoliant class. Its molecule is too large to penetrate quickly, so it smooths the surface without the sting of an AHA, and it is a humectant at the same time.
- Polyglyceryl-10 Laurate emulsifier
- Polyglyceryl-10 Laurate is a sugar-derived emulsifier and solubiliser, mild enough to be a standard choice in Korean essences. It dissolves small amounts of oil into water without any tightening feel.
- Polyglyceryl-10 Myristate emulsifier
- Polyglyceryl-10 Myristate is a mild sugar-derived emulsifier used to keep oil dispersed in a watery formula.
- Glycerin humectant
- Glycerin is the most used humectant in skincare. It draws water into the outer layer of skin and holds it there, and it is one of the very few ingredients whose hydrating effect is settled science rather than marketing. Higher amounts feel tacky, which is why it is usually blended.
- Panthenol humectant
- Panthenol is pro-vitamin B5: skin converts it to pantothenic acid. It is a humectant that holds water and leaves skin feeling soft and less tight, and it is one of the ingredients formulators reach for when a formula also contains something harsh.
- Allantoin active
- Allantoin is a comfrey-derived compound used to condition skin and soften the outer layer so it feels smoother. It is one of the standard additions to a formula built for easily irritated skin.
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- Arginine amino acid
- Arginine is an amino acid that does two jobs here: it holds water in the outer layer of skin, and it neutralises acidic gelling agents, which is why it often stands in for a synthetic pH adjuster.
- Sodium Hyaluronate humectant
- Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it.
- Melaleuca Alternifolia (Tea Tree) Leaf Oil fragrance component
- Tea Tree Leaf Oil is an essential oil from an Australian shrub, carrying terpinen-4-ol. Korean formulas use it in products aimed at blemish-prone skin; it is potent, aromatic, and one of the essential oils most likely to bother reactive skin.
- Asiaticoside active
- Asiaticoside is one of the four active triterpenes isolated from centella and the most studied of them. Korean formulas name it separately when they want to show which fraction of the plant they standardised.
- Asiatic Acid active
- Asiatic Acid is the third of centella's four triterpenes and the aglycone form, meaning it has no attached sugar. It is oil soluble, so it turns up in cica creams and balms more than in watery layers.
- Madecassic Acid active
- Madecassic Acid is the fourth centella triterpene. A list that names all four is telling you the extract was standardised rather than simply pressed, which is the difference between a cica claim and a cica formula.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809598450141
- Made in
- Republic of Korea
- Volume
- 125ml
- Category
- Toner
- Actives
- Allantoin, Betaine Salicylate, Centella Asiatica, Green Tea, Panthenol, Sodium Hyaluronate, Tea Tree
- Ships from
- California or Korea
Orders ship from California or direct from Korea with tracked delivery to your door, and both routes carry the same Korean-market release. Shipping is free on orders of $100 or more. Returns are accepted for 30 days, by mail.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Barcode
Listed against the Korean barcode on its box - 3California or Korea
Ships to you from either, as the same Korean-market release
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name. The barcode in the specification above is the Korean-market one and it is printed on the box you receive.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Every order ships from California or direct from Korea, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
Key benefits
- Green tea leaf water is the first ingredient, not plain water
- Betaine salicylate gives gentle BHA-style sebum and pore care
- Gluconolactone adds a mild, hydrating polish to skin texture
- Panthenol, allantoin and tea tree leaf oil keep the formula calm
Inside the formula
Inside the formula
Reviews
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COSRX AC Collection Calming Liquid Mild
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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COSRX, Korean-market original
Mild calming exfoliant, 125 ml, on Green Tea Water with Betaine Salicylate.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
COSRX verifies units itself. Find the verification page on cosrx.com and enter the batch number and expiration date printed on your unit. Read them off the package rather than from us, which is the point.
Source: COSRX FAQ
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about skin care, quoted from the medical sources linked beside each.
Your skin barrier is basically your outer layer of the skin.
Melissa Piliang, MDDermatologist, Cleveland Clinic Pretty much every step of a Korean skin care routine is going to have some component of hydration.
Alok Vij, MDDermatologist, Cleveland Clinic
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