Kulletin
COSRX Niacinamide 2% + BHA 4% Blackhead Exfoliant Toner 3.38 fl.oz / 100ml, Korean Toner, Blackhead Remover, Pore Minimi

COSRX

Niacinamide 2% + BHA 4% Blackhead Exfoliant Toner 3.38 fl.oz / 100ml, Korean Toner, Blackhead Remover, Pore Minimi

4.5 · 40 reviews · aggregated from Amazon

4.540 aggregated reviews
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What reviewers say

The COSRX BHA Blackhead Power Liquid is a chemical exfoliant formulated with betaine salicylate, designed to clear congested pores and refine skin texture. While many users report significant improvements in blackhead reduction, pore size, and overall skin clarity, results can be slow and require consistent, long-term use. The product is generally praised for its gentle, non-irritating formula, though some users with stubborn hormonal acne or specific skin types may find it less effective or occasionally drying.

Loved

  • + Gentle on sensitive skin compared to higher-strength BHAs
  • + Effective at refining pore appearance and smoothing texture over time
  • + Lightweight, non-greasy formula that layers well with other products
  • + Long-lasting bottle due to small amount needed per application
  • + Helps clear out sebaceous filaments and stubborn congestion

Complaints

  • Leaky pump nozzle causes product waste
  • Can be drying for some skin types if not followed by moisturizer
  • Slow results for stubborn or hormonal acne
  • May cause an initial purging period for some users
  • Some users report no visible improvement in blackheads

By skin type

dry: Some users find it drying and emphasize the need for immediate moisturizing.oily: Often reports the best results for pore congestion, though can still be drying if overused.sensitive: Generally well-tolerated, but some users recommend caution and barrier protection.acne-prone: Helps with breakouts, but may cause purging initially.combination: Effective for T-zone congestion but may require spot-application.

The Verdict

The COSRX Niacinamide 2% + BHA 4% Blackhead Exfoliant Toner stands out as a reliable, entry-level chemical exfoliant for those struggling with sebaceous filaments and uneven texture. While it isn't an overnight miracle for hormonal acne, its gentle formulation makes it a staple for those who find high-strength acids too aggressive.

Who It’s For

This toner is best suited for individuals with oily or combination skin types who deal with persistent congestion in the T-zone. Because it relies on a lower-strength BHA, it is generally well-tolerated by sensitive skin, provided you maintain a solid hydration routine afterward.

The Pros

  • Gentle Efficacy: Unlike harsh salicylic acid treatments, this formula refines pore appearance without causing immediate irritation.
  • Texture Improvement: With consistent, long-term use, many users report a smoother skin surface and a reduction in stubborn congestion.
  • Layer-Friendly: Its lightweight, non-greasy consistency makes it easy to integrate into a multi-step K-beauty routine without pilling or heavy residue.

The Cons

  • Packaging Flaws: The pump nozzle is notoriously prone to leaking, which leads to unnecessary product waste.
  • Slow Results: If you are looking to treat deep-seated hormonal acne, this product may fall short. It requires patience and consistent application to see visible changes in pore size.
  • Potential for Purging: As with most chemical exfoliants, some users experience an initial purging phase as the product clears out deep-set debris.

How to Use It

For best results, apply a small amount to clean, dry skin, focusing on areas with visible blackheads. Because the formula can be drying, it is essential to follow up with a nourishing moisturizer to protect your skin barrier. If you have dry skin, consider using this as a spot treatment rather than an all-over toner.

From the reviews(40 aggregated from Amazon)

This is definitely gentler than salicylic acid while being comparatively as effective in my experience. Overall if you are looking to clear your skin of filaments, this definitely works.
Reviewer5.0AmazonRead full review →
My only complaint would be with how viscous it is. It leaks everywhere around the nozzle.
Reviewer5.0AmazonRead full review →
When I started using this, I experienced a LOT of purging. I don’t think I’ve ever had so many closed comedones concentrated on my skin in my life.
Reviewer4.0AmazonRead full review →
Since I got past the 6-8 week mark of using BHA Power Liquid, I haven't had a major breakout in 8 months!! It's not just my blackheads that started clearing (FYI, those took 3-6 months to actually disappear completely), it's my whole face that has improved!
Reviewer5.0AmazonRead full review →
This BHA was enough to calm the whiteheads after maybe two or three days of consistent application upon the whitehead, reduce the size of the acne cysts (those took a little more patience), and the blackheads started coming out on their own(!!!) not long after beginning consistent application.
Reviewer5.0AmazonRead full review →

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