COSRX
AHA 7 Whitehead Power Liquid
COSRX's AHA liquid exfoliant, swept on with a cotton pad in the evening for skin that looks bumpy and rough. 100 ml.
No reviews yet100ml
- Korean-market formula
- Ships from our California warehouse
- Duties prepaid
- Suited to
- DryDehydratedSensitiveCompromised barrier
- Helps with
- DehydrationBarrier weaknessRough surface textureUneven tone and dullness
Sold out.
Tell us where to send it
One email, the moment this exact unit is back in stock. Not a newsletter and not a sequence, and your address comes off the list the second it is sent.
- Duties prepaid
- 30-day returns
- Free US shipping on orders of $100 or more
- Dispatched within 2 business days
How it works
An acid exfoliant works at the surface, loosening what is already on its way off so the skin underneath looks smoother and takes the next layer more evenly. This is the AHA in COSRX's line, a thin liquid rather than a cream, swept over dry skin with a cotton pad in the evening. It stands in for the toner step on the evenings you use it, and moisturizer goes over the top afterwards. Two or three evenings a week is a sensible ceiling, and sunscreen the following morning is part of using an acid at all. It suits skin that looks bumpy across the forehead and chin and is not already on a retinoid.
Key benefits
- Apple fruit water, not plain water, is the first ingredient
- Glycolic acid, at the 7 percent named on the label, sits third on the list
- Niacinamide follows directly at fourth for tone
- Panthenol and sodium hyaluronate cushion the acid so the formula does not read as harsh
- Sodium hydroxide's only job here is pH balance, not activity
How to use
- Use the AHA 7 Whitehead Power Liquid in the evening, after cleansing, in place of your toner step.
- Damp a cotton pad and sweep it over dry skin, keeping clear of the eyelids and the corners of the mouth.
- Wait a minute, then carry on with a hydrating layer and your moisturizer the same evening.
- Start at two evenings a week and build from there. Do not use it in the same routine as another exfoliating acid or a retinoid.
COSRX AHA 7 Whitehead Power Liquid
How strong is the glycolic acid in this liquid exfoliant?
Glycolic acid sits third on the ingredient list, after the apple fruit water base and butylene glycol, with no percentage declared on the label. That early position on the list is the only strength signal available; without a declared number, the exact percentage cannot be stated, so starting with limited frequency is the safer approach.
Is this exfoliant suitable for sensitive skin?
Glycolic acid is an AHA and can be more irritating on sensitive or reactive skin than a BHA formula, though niacinamide, panthenol and sodium hyaluronate further down the list are included to support comfort. Anyone new to AHA exfoliants should start with limited frequency and watch how the skin responds.
Does this product contain niacinamide alongside the acid?
Yes, niacinamide sits fourth on the list, right behind the glycolic acid and ahead of sodium hyaluronate and panthenol. Pairing a brightening-support ingredient with an AHA is a common formulation choice in Korean liquid exfoliants, and applying it as a leave-on step after cleansing gives both ingredients time to work before the next layer goes on.
What does 'Whitehead Power' mean for how this product is used?
The naming points to surface texture and visible whiteheads as the target, which is the classic use case for an AHA like glycolic acid: it works on the skin's surface to loosen the bonds between dead cells rather than reaching inside a clogged pore the way a BHA does.
Can this be layered with a moisturizer right after use?
Yes, sodium hyaluronate and xanthan gum sit near the end of the list to support the skin's moisture level after the acid step, and following with a moisturizer is standard practice after any leave-on exfoliating liquid.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809416470047
- Made in
- Republic of Korea
- Volume
- 100ml
- Category
- Exfoliator / AHA Liquid Exfoliant
- Actives
- Glycolic Acid, Niacinamide, Panthenol, Sodium Hyaluronate
- 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. 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.
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
We accept
Worth knowing
- This formula carries an active acid, so pairing it with another exfoliant in the same routine is worth spacing out.
Reviews
No reviews yet. Tell us how much you love the product!
Write Reviews (opens in a new tab)We’re on gram!
Creators trying on authentic Korean skincare routines and products from us.
Rating a shelf of Dr. Althea products one by one.
Jasmine Loo · YouTube
Two hydrating serums side by side, IUNIK and Dr. Althea.
Kristin · YouTube
A walk through the Dr. Althea serum lineup and who each one suits.
auraofmahmuda · YouTube
A blunt first take on the Dr. Althea range.
Lexi Chang · YouTube
A first look at the viral 345 Relief Cream before buying.
Shelley Nayak · YouTube
A first try of the Dr. Althea serum on camera.
Hannah Ziad · YouTube
COSRX, Korean-market original
AHA exfoliating liquid, 100 ml, with Glycolic Acid and Niacinamide.
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
Ask an AI assistant about this product
Ask an AI assistant about this product
Opens ChatGPT, Perplexity or Claude in a new tab with the question prefilled. Claude asks you to sign in first.