COSRX BHA Blackhead and AHA 7 Whitehead Power Liquid
COSRX Power Liquids Showdown: BHA vs. AHA
If you're choosing between COSRX’s exfoliating heroes, here’s a side-by-side guide to help you pick the right one for your skin concern—and how to use them safely and effectively.
Product Overview
COSRX BHA Blackhead Power Liquid (100 ml)
- Contains 4% betaine salicylate (BHA) and willow bark water
- Oil-soluble formula penetrates deep into pores
- Best for: open comedones, blackheads, oily/acne-prone skin
- Helps refine texture, shrink pores, and control sebum build-up
COSRX AHA 7 Whitehead Power Liquid (100 ml)
- Contains 7% glycolic acid (AHA) and apple fruit water base
- Water-soluble formula exfoliates surface dead skin
- Best for: surface whiteheads, dullness, dehydrated or mature skin
- Smooths texture and promotes brighter, more even tone
COSRX BHA Blackhead Vs. AHA 7 Whitehead Power Liquid
| Feature | BHA Blackhead Power Liquid | AHA 7 Whitehead Power Liquid |
|---|---|---|
| Primary Exfoliant | Betaine Salicylate (BHA) | Glycolic Acid (AHA) |
| Penetrates Into | Oil-filled pores | Surface dead skin cells |
| Best For | Blackheads, oily & acne-prone skin | Whiteheads, congestion, texture |
| Use Frequency | 1–3×/week (or spot treat) | 1–4×/week depending on skin sensitivity |
| pH Level | ~3–4 to ensure efficacy | ~3.8–4, effective yet gentle |
| Texture | Slightly thicker, melanated texture | Thin, watery serum |
Who Should Use Which?
- BHA Blackhead Power Liquid is ideal if you suffer from blackheads, excess oil, or clogged pores. It goes deep and can help clear stubborn congestion.
- AHA 7 Whitehead Power Liquid is perfect for gentle daily exfoliation, refining skin texture, and targeting surface-level whiteheads without over-drying.
Can You Use Them Together?
Yes! Many skincare enthusiasts layer both products for balanced results:
- Apply BHA in oily or congested areas (e.g., nose, chin).
- Follow with AHA across the rest of the face to slough off surface dead skin.
- Wait 30 minutes between layers for maximum effectiveness.
This method combines deep pore cleaning with visible brightness and smoothness.
How to Use (Safely)
- Use them at night, not together with other acids or retinol.
- Apply on clean, dry skin. Wait 30 minutes before layering other products.
- Start slow—once a week per acid—and build tolerance.
- Always patch test and follow with SPF during the day.
What Users Are Saying
“The AHA liquid erased my stubborn whiteheads in under a week—it’s a miracle worker for surface texture.”
“BHA liquid is incredible at keeping my pores clear. It’s not gentle at first, but it’s worth it if you're consistent.”
Available at Lakinza.ca (Canada)
You can shop both formulas in Canada at Lakinza.ca, with fast shipping, 10% welcome discount, and loyalty rewards:
- BHA Blackhead Power Liquid → Available here
- AHA 7 Whitehead Power Liquid → Available here
FAQ
Q: Which one reduces acne scars faster?
Both help skin turnover—but AHA shines at clarifying dullness, while BHA clears oil-sealed scars under the surface.
Q: Will BHA cleanse oilier zones overnight?
Yes. BHA penetrates deep into pores to dissolve oil and congestion—ideal for oily or T-zone skin.
Q: Will either product irritate sensitive skin?
AHA can be more surface-drying. BHA has anti-inflammatory willow bark and niacinamide to soothe. Start slow!
Q: Can I use during acne treatments like benzoyl peroxide or retinoids?
Not at the same time—this can over-exfoliate. Alternate nights or recover first with a hydration-first routine.
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