AHA 7 Whitehead Power Liquid — Reddit Reviews
by COSRX
Updated September 30, 2026
Glycolic acid exfoliant for whiteheads and rough texture; can sting.
What the community says
A glycolic acid exfoliant with niacinamide and panthenol that the community uses for whiteheads, flakes, and rough texture. Studies found glycolic acid helps acne, and Redditors say it can work fast. Sensitive or dehydrated skin can get stung or stripped.
What this means for you
What people love
- OG glycolic acid exfoliant
- Whiteheads often vanish overnight
- Helps flakes and rough texture
Watch out for
Product details
Use caution
Skin Type
Key Ingredients
Where to buy
What the science says vs. what Reddit says
Hyperpigmentation
Some evidence
Glycolic Acid: 15 studies tested it on its own. See all 26 studies
Both ingredients for hyperpigmentation
Glycolic Acid Some evidence
- Most studies found glycolic acid helped fade dark spots or patches
- It often worked better when used with other treatments than those treatments alone
- Used on its own, it also faded dark patches in many people
- It usually worked about as well as several other peel treatments, retinol, and tretinoin peels
- Side effects were reported with glycolic acid peels, though details were not given here
Niacinamide Some evidence
5 studies tested it on its own. See all 24 studies
- All of these studies found niacinamide helped fade dark spots or patches
- Niacinamide 5% faded dark spots more than a placebo in studies of sun-damaged skin and dark patches
- Used with salicylic acid peels, niacinamide improved dark patches more than peels alone
- A niacinamide mix faded dark spots better than niacinamide alone in one study
- One study found the fading effect reversed after niacinamide was stopped
Acne
Some evidence
Glycolic Acid: 13 studies tested it on its own. See all 22 studies
On Reddit: Glycolic acid from AHAs clears whiteheads overnight before they fully form, when applied at first red bumps. 18 mentions
Both ingredients for acne
Glycolic Acid Some evidence
Niacinamide Some evidence
6 studies tested it on its own. See all 17 studies
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 53 mentions across 29 threads
COSRX AHA 7 Whitehead Power Liquid on Reddit, in one place — 29 threads from r/30PlusSkinCare, r/AsianBeauty and 3 more, summarized.
“CosRX AHA 7. It is the OG of glycolic acids”
Positive
“and doesn’t have that weird smell that the Ordinary toner has”
Positive
“Anyone know (affordable) swaps for the ordinary? Specifically the glycolic acid?”
Positive
“CosRX AHA Whitehead Power Liquid”
Positive
“Really good at getting rid of whiteheads and sebaceous filaments.”
Positive
“AHA every other PM”
Positive
“One of the better exfoliating products I've tried.”
Positive
“It helped smooth my skin without causing irritation, and my skin felt calmer rather than stripped afterward.”
Positive
“COSRX AHA 7 Whitehead Power Liquid is a HG product for me as well. It does such a great job at exfoliating and my skincare goes on so smoothly afterward.”
Positive
“CosRx AHA 7 Whitehead Power Liquid”
Mentioned
“Right now I have Cosrx AHA/BHA Clarifying Treatment Toner, Cosrx BHA Blackhead Power Liquid, Cosrx AHA 7 Whitehead Power Liquid, and OST C20.”
Mentioned
“The AHA is photosensitizing - And it is a low percentage of glycolic, but it's still glycolic, which some people dislike no matter what.”
Mentioned
“Cosrx AHA Whitehead Power Liquid”
Cautionary
“I [burned with glycolic acid] (hooray - this was before I knew to dilute the AHA Whitehead Power Liquid).”
Cautionary
“It seems to be helping get rid of any flakes I get, especially on my nose/nostrils and eye sockets”
Cautionary
“Cosrx AHA Whitehead Power liquid”
Positive
“I find a combination of AHA and lots of hydration makes a massive difference.”
Positive
“Rn it's:”
Positive
Dupes & Alternatives
Paula's Choice
Skin Perfecting 2% BHA Liquid Exfoliant
Better for Texture / Pores
5 shared traits
813 mentions
