COSRX BHA Blackhead Power Liquid — image 11 / 7
COSRX · Serum

BHA Blackhead Power Liquid

Korea ranking #9 serumUS stock

A slow-and-steady chemical exfoliant for blackheads and clogged pores, built around betaine salicylate — a gentler cousin of salicylic acid. It works over weeks rather than days, which makes it a comfortable first BHA for combination and oily skin that finds stronger acids harsh or stinging.

More detail

The active is 4% betaine salicylate, a milder BHA that loosens the oil-and-dead-cell mix inside pores, carried in a base of willow bark water — the plant source salicylates were originally derived from. Niacinamide helps fade the marks blemishes leave behind, while sodium hyaluronate and panthenol keep the formula from feeling stripping; there's no alcohol, fragrance, or essential oil. It's a lightly slippery liquid used after cleansing at the toner or essence step — wiped on with a cotton pad or patted in by hand, avoiding the eye and lip area — and left to absorb before the next layer. Start two or three times a week and build up only as your skin tolerates it. Don't stack it with other acids, retinoids, or strong vitamin C in the same session, and wear sunscreen daily while any exfoliating acid is in your routine. As with any salicylate product, check with a doctor before using it while pregnant or breastfeeding.

4.55,600 reviews
AEvidence grade
$17.50Best total · duties in
lightTexture · Serum
For: Oily · Combination · NormalAll tonesPores & OilAcneTexture
Is this right for your skin? take the 60-second quiz and this box becomes a personal verdict.
Skin fit ×45%
Evidence ×35%100
Practicality ×20%50
Ingredient check⚠ 1 caution flag
Fragrance-free Fungal-acne safe No drying alcohol Essential-oil free No pregnancy-caution actives
BHA (salicylic)Oil-soluble exfoliant that clears inside the poreNiacinamideMultitasker: fades dark spots & PIH, regulates oil, strengthens barrier
Evidence checkGrade A · MFDS ✓
🇰🇷 MFDS-certified functional cosmetic brightening (미백)Filed with Korea's FDA as 「코스알엑스바하블랙헤드파워리퀴드」 — a regulator-reviewed efficacy claim, not a marketing one.
Grade A4% betaine salicylate at disclosed dose; a decade of r/SkincareAddiction-era track record.
How grading works
Scored on clinicals · certifications · cross-platform rating consistency · transparency. Brands can't pay to change this.
What Korea says#9 serum
#9 serum · Korea ranking · 10-year global staple of the acids generation
"For blackheads, consistency with this is the answer."Translated from a Korean review · original: "블랙헤드는 이거 꾸준히 쓰는 게 답."
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Where to buybest total $17.50
RetailerPriceShip + dutyTotal
Amazon ✓ official
Official store — verify seller before launch
Accepts: Visa · MC · Amex · Discover · Amazon Pay · Affirm
$25$25Shop →
Olive Young Global ✓ official
Ships from Korea 7–14d · +15% duty
Accepts: Cards · PayPal · Apple Pay · Alipay+
$20$10.00$30Shop →
COSRX official ✓ officialSALE −30%
Live store price · Brand's own US store
Accepts: Cards · PayPal (varies)
$17.5$25$17.50BESTShop →

Totals include estimated import duty on Korea-shipped orders (15%, post–de minimis). Links open retailer search; exact product links are coming at launch. Payment methods indicative — verify at checkout.

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