COSRX
AC 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.
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- Suited to
- DryDehydratedSensitiveCompromised barrier
- Helps with
- DehydrationBarrier weaknessEarly environmental damageRough surface texture
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- 30-day returns
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- Dispatched within 2 business days
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.
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
Key actives
Betaine Salicylate
gentle exfoliating care for congested pores
Gluconolactone
a mild PHA-class polish that respects sensitive skin
Panthenol
vitamin B5 that comforts and hydrates
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.
- Ships from
- California
Duties are prepaid. Nothing is owed at delivery. Returns are accepted for 30 days, by mail.
Orders ship from our California warehouse, dispatched within 2 business days, and arrive in 3 to 5 days. Shipping is free on orders of $100 or more.
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 - 2Customs
Duty paid by us before it enters the US - 3California
Ships domestically, no international leg
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.
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.
Import duties are paid by us before the parcel reaches you, so nothing is owed at the door, 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.
Payment and security
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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.
Reviews
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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 the key actives in this formula, quoted from the medical sources linked beside each.
Pantothenol is a common ingredient in skin care and hair products I recommend, particularly for people who are prone to dryness.
Taylor Bullock, MDDermatology resident, Cleveland Clinic This means that gluconolactone acts as an exfoliating acid, but also as a moisturizer. It has moisturizing, soothing, and lightening properties, working well on dry skin.
Paola PeruginiPhD, Journal of Cosmetic Dermatology
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