AHA/BHA Clarifying Treatment Toner — Reddit Reviews
by COSRX
Updated September 3, 2026
Salicylic and glycolic acids clear pores and acne; can dry and irritate skin.
What the community says
This toner uses salicylic and glycolic acids to exfoliate and clear pores. Redditors find it effective for oily, acne-prone, and keratosis pilaris skin but caution it can cause dryness and barrier irritation. Studies found salicylic acid generally clears acne well with fewer side effects than alternatives.
What this means for you
What people love
- Gentle chemical exfoliation under 1% acids; beginner-friendly daily use
- Clears closed comedones and whiteheads without irritation
- Effective for smoothing keratosis pilaris on body
Watch out for
- Can be very drying—limit use to 2-3 times weekly
- Too acidic and irritating for damaged or eczema-prone skin
- May harm skin barrier if used daily without moisturizing
Product details
Use caution
Skin Type
Product Traits
Key Ingredients
Where to buy
What the science says vs. what Reddit says
What the science says
Salicylic Acid
Strong evidence for acne- It usually helped clear acne, though results were sometimes mixed and a few studies only showed it matched other treatments
- 30 studies back this, including large reviews
- It often worked about as well as tretinoin, adapalene, benzoyl peroxide, mandelic acid, Jessner's solution, and some light treatments
- Some studies found it worked better when used with other treatments than when those treatments were used alone
- Side effects were usually milder than with some comparison treatments, with less dryness and fewer side effects overall
What Reddit says
The why
Glycolic and salicylic acids together clear closed comedones and smooth skin after several weekly uses.
“i use it 2-3 times a week and it’s done a great job at clearing out the closed comedones and little white bumps”
7 mentions for acne
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 70 mentions across 27 threads
COSRX AHA/BHA Clarifying Treatment Toner on Reddit, in one place — 27 threads from r/koreanskincare, r/AsianBeauty and 3 more, summarized.
“I forgot what some of the products I've tried but here are some of what I can remember.”
Mentioned
“COSRX AHA/BHA Clarifying Toner”
Mentioned
“I've also tried other brands from other countries.”
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
“I use it after COSRX AHA/BHA Toner.”
Mentioned
“pH adjusting toners lowers the pH of your skin after cleansing, readying it for pH-dependent actives.”
Mentioned
“Cosrx AHA BHA toner, Skin1004 centella, Cerave SA smoothing cream”
Mentioned
“How's it working for u???”
Mentioned
“10/10 products”
Mentioned
“I have been using the CosRX AHA/BHA toner which did not work for my face- way too strong and sensitizing.”
Positive
“It works well for my arms.”
Positive
“Just after 1 application my arms were noticeably smoother.”
Positive
“you can also use widely available cosrx!”
Positive
“I use their aha/bha toner 2-3x/week and it's totally cleared up my KP”
Positive
“I also put it on my butt for a super smooth 🍑”
Positive
“CosRX AHA/BHA Clarifying Toner improved my acne scarring almost immediately”
Positive
“I started using it once every 3 nights or so and now use it every other night.”
Positive
“It does dry your skin a bit so keeping up with moisturizer is important.”
Positive
