How often should I use it if I am new to glycolic acid?

COSRX labels it best for experienced users. Begin once a week rather than jumping straight into daily use. If there is no persistent dryness, redness or stinging, increase gradually to two or three times weekly. Using more often is not automatically better. Keep the rest of the routine simple on exfoliation days so you can identify whether this product suits your skin.

Should I apply it with my hands or a cotton pad?

The official directions show a cotton pad swept over skin, and the pump makes that amount easy to measure. Apply after cleansing to dry skin; a simple hydrating toner can come first. One light pass is enough. Hands can waste less product, but avoid rubbing and wash them afterward. Keep the liquid away from the eye area, lips and broken skin.

Can I use it with BHA, retinol or vitamin C?

COSRX's exact-product FAQ says not to use it in the same routine as other AHAs, BHAs, retinoids or vitamin C. Separating concentrated steps across different nights makes irritation easier to track. This matters even when another acid is inside a cleanser. Follow prescription directions first, and do not add several new actives at the same time.

Is stinging or redness normal, and is a breakout just purging?

A brief sensation does not prove exfoliation is working. Persistent burning, redness, itching, flaking or new bumps means scale back or stop. COSRX advises gradual introduction because sensitive skin may become irritated. Do not assume every breakout is purging. Let skin recover with a simple cleanser, moisturizer and sunscreen, then seek professional advice if the reaction is severe or does not settle.

Can I use COSRX AHA 7 in the morning?

The official directions allow daytime use when it is followed by broad-spectrum SPF 30 or higher. Many shoppers prefer evening because it simplifies sun protection and active layering. Either way, sunscreen matters every morning while using an AHA, including non-exfoliation days. Apply enough, reapply during prolonged exposure, and do not use the exfoliant on sunburned or visibly compromised skin.

How long should it take to change whiteheads or rough texture?

COSRX does not publish a controlled exact-product efficacy timeframe on the current page. Shopper reports range from softer-feeling skin early on to several weeks for visible whitehead or tone changes, and some report no improvement. Judge it with consistent photos and comfort over time. More frequent use will not guarantee faster results and may make the routine harder to tolerate.

Can I use it while pregnant or breastfeeding?

COSRX's current exact-product FAQ says to avoid AHA and BHA products during pregnancy or breastfeeding. Personal circumstances and local guidance vary, so pause and ask your obstetric clinician or pharmacist to review the current box formula. This product page cannot provide individual medical clearance, and a brand FAQ should not replace advice from the professional who knows your situation.

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COSRX

COSRX AHA 7 Whitehead Power Liquid 100ml

Smoother feel
Fresh glow
Moisture support
Watery liquid

100ml ·$10.99 USD

Smoother feel

Fresh glow

Moisture support

Watery liquid

PRODUCT DETAILS

COSRX AHA 7 Whitehead Power Liquid is a leave-on exfoliant for experienced acid users dealing with visible whiteheads, rough texture and dullness. The lightweight liquid sweeps away surface buildup to leave skin looking smoother and more even, while its pump makes a thin cotton-pad layer easy to control.

The focused 10-ingredient formula pairs 7% glycolic acid with 78.05% apple fruit water and 2% niacinamide. Panthenol and sodium hyaluronate add moisture support, helping this feel more balanced than a bare acid step without turning it into a moisturizer.

COSRX recommends it for dry and combination skin and labels it best for experienced users. Exact-product feedback is mixed: some shoppers report softer texture and fewer whiteheads, while others mention burning, redness, worsening bumps or little change. Introduce it slowly rather than chasing tingling as proof it works.

Start once weekly after cleansing, using enough to dampen a cotton pad and swipe a thin layer across dry skin. Leave it on unless your current product label or clinician gives different instructions. Increase toward two or three times weekly only if comfortable, avoid the eye and mouth area, separate it from other strong actives, moisturize afterward, and use sunscreen every day.

Learn more

GOES WELL WITH

1+1 Toning C Vita Shot Ampoule$28.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

100 VITA-LIGHT Reedle Shot$9.49 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Eye Cream$22.99 USD

1025 Dokdo Lotion$14.99 USD

1025 Dokdo Sleeping Pack$15.99 USD

1025 Dokdo Sun Cream$18.99 USD

A concentrated exfoliating liquid that balances visible smoothing and tone care with a short, moisture-supportive formula.

Smoother texture
Visible whitehead care
Brighter-looking tone
Moisture support

Key Ingredients

Niacinamide

Helps visibly brighten uneven tone and support the skin barrier.

Panthenol

Pro-vitamin B5 that helps skin hold moisture and feel softer and more comfortable.

Clear hydrogel spheres and droplets on a pale lilac background.

Hyaluronic Acid

Helps hydrate and visibly plump the skin.

Translucent exfoliating liquid pooled in a rounded swatch on a textured lavender surface.

Concerns & Benefits

Your Concerns

1
Texture
Rough, flaky surface buildup can leave makeup uneven and skin feeling less smooth.
2
Dull Skin
A lack of visible radiance can make otherwise balanced skin look flat or tired.
3

How To Use

At night or during a carefully protected daytime routine, cleanse and dry the face. Saturate a cotton pad lightly, then sweep a thin layer across the face or areas with whiteheads, keeping clear of eyes, lips and broken skin. Leave it on and follow with moisturizer. Begin once weekly; if comfortable, build to two or three times a week. Do not stack it with other strong acids, retinoids or pure vitamin C, and wear SPF 30+ daily.

Close view of one hand dispensing the frosted pump bottle onto a cotton pad held in the other hand.

Frequently asked questions

Is COSRX AHA 7 a toner, and do I wash it off?

It is a leave-on exfoliating liquid, not an everyday hydrating toner. COSRX places it in the exfoliator step after cleansing and toner, and its directions say there is no need to wash it off. Apply a thin layer, let it settle, then follow with moisturizer. If your current box gives different instructions, follow the label you received.

Customer reviews

Frequently Bought Together

Buy these products together

This itemCOSRX AHA 7 Whitehead Power Liquid 100ml$10.99 USD

1+1 Toning C Vita Shot Ampoule$28.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

Total price: $48.07 USD

This itemCOSRX AHA 7 Whitehead Power Liquid 100ml$10.99 USD

1+1 Toning C Vita Shot Ampoule$28.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

Total price: $48.07 USD

Cell Fusion C

1+1 Toning C Vita Shot Ampoule

15% vitamin C and sponge micro-spicules for brighter, smoother, hydrated-looking skin.

20g + 20g$28.99 USD

VT COSMETICS

100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10$8.09 USD

VT COSMETICS

100 VITA-LIGHT Reedle Shot

A jelly-like evening ampoule for brighter, more even-looking skin in single-use pouches.

2 ml × 10 pouches$9.49 USD

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 USD

ROUND LAB

1025 Dokdo Eye Cream

Lightweight daily eye care for hydration, brightness and smoother-looking fine lines.

30 ml / 1.01 fl oz$22.99 USD

ROUND LAB

1025 Dokdo Lotion

A lightweight, unscented facial moisturizer with three forms of hyaluronic acid for lasting moisture without stickiness.

200 ml$14.99 USD

ROUND LAB

1025 Dokdo Sleeping Pack

A lightweight, unscented overnight gel for hydration and smoother-feeling skin.

100 ml$15.99 USD

ROUND LAB

1025 Dokdo Sun Cream

SPF 50+ PA++++ protection in a lightweight, no-white-cast lotion.

50 ml$18.99 USD

COSRX AHA 7 Whitehead Power Liquid 100ml | Sleepy Hello

COSRX

COSRX AHA 7 Whitehead Power Liquid 100ml

Smoother feel
Fresh glow
Moisture support
Watery liquid

COSRX AHA 7 Whitehead Power Liquid 100ml

100ml ·$10.99 USD

Smoother feel

Fresh glow

Moisture support

Watery liquid

PRODUCT DETAILS

Learn more

GOES WELL WITH

1+1 Toning C Vita Shot Ampoule$28.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

100 VITA-LIGHT Reedle Shot$9.49 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Eye Cream$22.99 USD

1025 Dokdo Lotion$14.99 USD

1025 Dokdo Sleeping Pack$15.99 USD

1025 Dokdo Sun Cream$18.99 USD

A concentrated exfoliating liquid that balances visible smoothing and tone care with a short, moisture-supportive formula.

Smoother texture
Visible whitehead care
Brighter-looking tone
Moisture support

Key Ingredients

Concerns & Benefits

Your Concerns

1
Texture
Rough, flaky surface buildup can leave makeup uneven and skin feeling less smooth.
2
Dull Skin
A lack of visible radiance can make otherwise balanced skin look flat or tired.
3

How To Use

Frequently asked questions

Is COSRX AHA 7 a toner, and do I wash it off?

Customer reviews

Frequently Bought Together

Buy these products together

This itemCOSRX AHA 7 Whitehead Power Liquid 100ml$10.99 USD

1+1 Toning C Vita Shot Ampoule$28.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

Total price: $48.07 USD

This itemCOSRX AHA 7 Whitehead Power Liquid 100ml$10.99 USD

1+1 Toning C Vita Shot Ampoule$28.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

Total price: $48.07 USD

Cell Fusion C

1+1 Toning C Vita Shot Ampoule

15% vitamin C and sponge micro-spicules for brighter, smoother, hydrated-looking skin.

20g + 20g$28.99 USD

VT COSMETICS

100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10$8.09 USD

VT COSMETICS

100 VITA-LIGHT Reedle Shot

A jelly-like evening ampoule for brighter, more even-looking skin in single-use pouches.

2 ml × 10 pouches$9.49 USD

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 USD

ROUND LAB

1025 Dokdo Eye Cream

Lightweight daily eye care for hydration, brightness and smoother-looking fine lines.

30 ml / 1.01 fl oz$22.99 USD

ROUND LAB

1025 Dokdo Lotion

A lightweight, unscented facial moisturizer with three forms of hyaluronic acid for lasting moisture without stickiness.

200 ml$14.99 USD

ROUND LAB

1025 Dokdo Sleeping Pack

A lightweight, unscented overnight gel for hydration and smoother-feeling skin.

100 ml$15.99 USD

ROUND LAB

1025 Dokdo Sun Cream

SPF 50+ PA++++ protection in a lightweight, no-white-cast lotion.

50 ml$18.99 USD