COSRX BHA Blackhead Power Liquid Review 2026
4% BHA that actually clears pores — not just talks about it.
COSRX BHA Blackhead Power Liquid
Uses betaine salicylate (a gentler form of BHA) to dissolve the oil and dead skin inside pores. More effective than most physical scrubs and gentler on skin than traditional salicylic acid.
Quick Verdict
COSRX BHA Blackhead Power Liquid is the best gentle BHA in K-beauty. If blackheads, enlarged pores, or oily skin are your concerns, this is a must-try.
What We Loved
- Visibly shrinks pores with regular use
- Clears blackheads and whiteheads
- Betaine salicylate is gentler than traditional BHA
- Reduces sebum production over time
- Works while you sleep
- 100ml bottle lasts 3–4 months
What We Didn't Love
- Must wait 20 minutes before next skincare step
- Not for dry or sensitive skin
- Can increase sun sensitivity — SPF required
- Results take 4–6 weeks to fully show
How to Use
Apply to dry skin after cleansing. Wait 20 minutes before applying other products. Start with 2–3 nights per week, then increase to nightly if tolerated. Always wear SPF the next morning.
How It Compares
- COSRX AHA 7 Whitehead Power Liquid ($25): BHA goes inside pores; AHA resurfaces skin texture. Use BHA for blackheads and oiliness, AHA for dullness and uneven texture.
- Paula's Choice 2% BHA ($34): Paula's uses traditional salicylic acid; COSRX uses betaine salicylate. COSRX is gentler and better for K-beauty routines.
- Some By Mi AHA BHA PHA Toner ($18): Some By Mi is a multi-acid toner for beginners. COSRX BHA is more targeted and powerful.
FAQ
How often should I use COSRX BHA?
Start with 2–3 times per week. Once your skin adjusts (2–4 weeks), you can increase to nightly use.
Can I use BHA and AHA together?
Not in the same routine. Alternate nights — BHA one night, AHA the next.
Why do I need to wait 20 minutes?
BHA needs an acidic environment to work. Other products raise your skin's pH, reducing effectiveness.
Will it dry out my skin?
It can cause initial dryness. Always follow with a good moisturizer, and reduce frequency if you experience flaking.
Does it help with cystic acne?
BHA helps with surface-level blackheads and whiteheads better than cystic acne. For cysts, consult a dermatologist.