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GS AHA BHA Facial Toner

GS AHA BHA Facial Toner

Product Description

Product overview

Made in Various INTERNATIONAL

A concentrated exfoliating toner with 7% Glycolic Acid (AHA) and 0.5% Salicylic Acid (BHA) formulated at pH 3.5 to effectively remove dead skin cells, unclog pores, and brighten skin tone. Enhanced with Niacinamide and soothing botanical extracts for a smoother, clearer complexion without irritation.

AHA 7% + BHA 0.5% Cruelty-Free Vegan Fragrance-Free Paraben-Free Alcohol-Free pH 3.5 KFDA Certified
Pregnancy
Caution
Fungal Acne
Yes
Comedogenic
1/5
Size
200ml / 6.76 fl oz
pH Level
3.5
Skin Concern
Acne, Texture, Pores
Key Actives
AHA + BHA + Niacinamide
Ethics
Vegan & Cruelty-Free
Real reviews · YouTube Shorts
Why it's different

Dual Acid Exfoliation

7% Glycolic Acid (AHA) dissolves surface dead skin cells while 0.5% Salicylic Acid (BHA) penetrates pores to clear oil and debris from within.

01

Texture & feel

SENSORY
Consistency
Watery / Liquid
Scent
Almost Scentless
Absorption
15–20 seconds
Finish
Matte / Natural

Dual Acid Exfoliation

7% Glycolic Acid (AHA) dissolves surface dead skin cells while 0.5% Salicylic Acid (BHA) penetrates pores to clear oil and debris from within.

Brightening & Tone Correction

Niacinamide (Vitamin B3) works alongside AHA to reduce hyperpigmentation, even out skin tone, and support barrier repair.

Soothing Botanical Base

Aloe vera leaf extract base with green tea, elderflower, and edelweiss extracts to calm and protect skin during exfoliation.

Clean Formula

Free from 6 harmful ingredients: parabens, gluten, formaldehyde, fragrance, sulfates, and artificial colorants. Vegan and cruelty-free.

02

Safety & compatibility

SAFE
Pregnancy & Breastfeeding

Contains 0.5% Salicylic Acid (BHA). While topical BHA at low concentrations is generally considered low risk, most dermatologists recommend avoiding salicylic acid during pregnancy. Consult your healthcare provider before use.

Fungal Acne (Malassezia) Safe

No ferments, fatty acids, fatty acid esters, polysorbates, or oils that feed malassezia. Safe for fungal acne-prone skin.

Non-Comedogenic

Oil-free, silicone-free formula with a comedogenic rating of 1/5. Very low risk of clogging pores.

Sun Sensitivity

AHA increases photosensitivity. Always apply SPF 30+ sunscreen during the day when using this toner. Best used in PM routine.

Patch Test Recommended

This is a concentrated acid toner (pH 3.5). Test a small amount on your neck before first use, especially if you have sensitive or reactive skin.

Irritant-Free Formula

Free from alcohol, fragrance, essential oils, parabens, sulfates, and artificial dyes. Suitable for sensitive skin when introduced gradually.

03

Ingredient breakdown

INGREDIENTS

Glycolic Acid 7%Proven

The smallest and most researched AHA molecule. At 7%, it effectively dissolves bonds between dead skin cells, promoting cell turnover for brighter, smoother skin. Also stimulates collagen production with long-term use.

  • Mechanism: Breaks down desmosomes (bonds between dead cells) on the skin surface to accelerate natural exfoliation
  • Effective range: Clinical studies show 5–20% concentrations are effective for exfoliation and anti-aging
  • Collagen boost: Concentrations above 5% stimulate glycosaminoglycan and collagen synthesis over time
  • Hydration: Increases natural hyaluronic acid production in the skin
Increases sun sensitivity. Always use SPF 30+ during the day. May cause slight tingling upon application, which is normal.

Salicylic Acid 0.5%Proven

An oil-soluble BHA that penetrates into pores to dissolve excess sebum and clear congestion. Has anti-inflammatory and anti-bacterial properties, making it effective for acne and blackheads.

  • Oil-soluble: Unlike AHAs, BHA can penetrate through sebum into pores for deep cleansing
  • FDA recognized: 0.5–2% concentrations approved as over-the-counter acne treatment
  • Anti-inflammatory: Structurally similar to aspirin, helping to calm redness and irritation
Use caution during pregnancy. Most dermatologists advise avoiding salicylic acid while pregnant or breastfeeding.

Niacinamide (Vitamin B3) ~3%Proven

A well-studied multi-tasking active that supports barrier repair, regulates oil production, reduces pore appearance, and fades hyperpigmentation. Stable and compatible with most other actives.

  • Barrier repair: Increases ceramide production to strengthen the skin barrier
  • Sebum regulation: Studies show 2–5% niacinamide reduces oil production and pore size
  • Brightening: Inhibits melanosome transfer to reduce dark spots and uneven tone
  • Anti-inflammatory: Helps reduce redness and calm irritated skin
Safe for all skin types including sensitive skin. Works synergistically with AHA/BHA to buffer irritation.

Aloe Barbadensis Leaf Extract BaseProven

Used as the primary base instead of water, providing soothing, anti-inflammatory, and hydrating properties. Rich in polysaccharides that help calm skin during acid exfoliation.

  • Soothing: Contains acemannan and other polysaccharides that reduce inflammation
  • Hydration: Natural humectant properties help maintain skin moisture during exfoliation

Camellia Sinensis (Green Tea) Extract TraceProven

Potent antioxidant rich in EGCG catechins. Protects skin from free radical damage and environmental stress while providing anti-inflammatory benefits.

  • Antioxidant: EGCG is one of the most potent antioxidants for skin protection
  • UV protection: Studies show green tea polyphenols help protect against UV damage

12 ingredients

Aloe Barbadensis Leaf Extract, Glycolic Acid, Propanediol, Betaine Salicylate, 1,2-Hexanediol, Niacinamide, Salicylic Acid, Sodium Hydroxide, Camellia Sinensis Leaf Extract, Momordica Charantia Fruit Extract, Sambucus Nigra Flower Extract, Leontopodium Alpinum Extract

FREE FROM: Parabens, Fragrance, Sulfates, Alcohol, Silicones, Artificial Colorants, Gluten, Formaldehyde, Mineral Oil, Essential Oils, Phthalates, PEGs
04

Where it fits in your routine

ROUTINE
1
Cleanser
2
This Toner
3
Essence
4
Serum
5
Moisturizer
6
Sunscreen (AM)

Use 2–3 times per week in your PM routine. On non-exfoliating days, use a hydrating toner instead. Always follow with sunscreen in the morning.

05

How to use

HOW TO USE
1

Cleanse Your Face

Wash with a gentle cleanser and pat skin completely dry. Apply this toner to dry skin for best results and to minimize stinging.

2

Apply the Toner

Dispense an appropriate amount onto a cotton pad and gently swipe across face and neck, avoiding the eye area. Alternatively, pat directly onto skin with fingertips.

3

Wait & Absorb

Allow 1–2 minutes for the toner to fully absorb before proceeding. A slight tingling sensation is normal and should subside quickly.

4

Follow with Hydration

Apply a hydrating serum or essence, then lock in with a moisturizer. In the morning, always finish with SPF 30+ sunscreen.

06

Who is it for?

WHO

Perfect for you if:

  • You struggle with blackheads, whiteheads, or clogged pores
  • You want to improve dull, uneven skin texture and tone
  • You have oily or combination skin prone to breakouts
  • You want an affordable K-beauty acid toner with proven actives
  • You prefer a minimal, clean ingredient list (only 12 ingredients)
  • You need a fungal acne-safe exfoliating toner

Consider alternatives if:

  • You have very sensitive or rosacea-prone skin (try a PHA toner instead)
  • You are pregnant or breastfeeding (contains salicylic acid)
  • You are new to chemical exfoliants (start with a gentler formula first)
  • You need intense hydration (this is an exfoliating toner, not a hydrating one)
  • You already use retinol or other strong actives daily
07

Skin type compatibility

SKIN TYPES
Oily Skin
Excellent

The AHA+BHA combo controls excess sebum while clearing pores. Watery texture absorbs instantly without adding shine.

Combination Skin
Excellent

BHA targets oily T-zone pores while AHA smooths dry cheeks. Balances well across different face zones.

Acne-Prone Skin
Excellent

Non-comedogenic, fungal acne-safe, oil-free formula. BHA unclogs pores while AHA fades post-acne marks.

Normal Skin
Good

Great for maintaining smooth, radiant skin. Use 2–3 times weekly for gentle resurfacing and brightening.

Sensitive Skin
Moderate

The 7% glycolic acid at pH 3.5 may be too strong. Start once a week, use as a short-contact treatment, or consider a gentler alternative.

Dry Skin
Moderate

Can help with flaking and texture, but follow with a rich moisturizer. Limit to 1–2 times per week to avoid over-exfoliation.

08

Results timeline

MONTHS 2–3
Week 1

Immediate Smoothness

Skin feels noticeably smoother after first few uses. You may experience slight tingling as acids work on the surface layer. Some users report mild purging if acne-prone.

70% noticed smoother texture
Weeks 2–3

Pore Clarity & Brightness

Blackheads start to diminish as BHA clears pore congestion. Skin appears brighter and more even-toned thanks to AHA exfoliation and niacinamide.

65% saw reduced blackheads
Weeks 4–6

Visible Texture Improvement

Rough, bumpy texture visibly refined. Post-acne marks begin to fade. Pores appear smaller and less visible. Skin has a healthy glow.

80% reported improved skin texture
Months 2–3

Long-Term Clarity & Tone

Consistent use delivers significantly clearer, more radiant skin. Hyperpigmentation continues to fade. Glycolic acid begins to support collagen production for anti-aging benefits.

75% achieved clearer complexion
09

Ratings by platform

3K+ REVIEWS
Amazon
4.4
Rating
2,200+
Reviews
Main complaint: Can be too strong for sensitive skin, causes tingling or stinging on some users
iHerb
4.5
Rating
500+
Reviews
Main complaint: Leaves a slight film on skin that can feel tacky under makeup
YesStyle
4.3
Rating
150+
Reviews
Main complaint: Packaging feels basic compared to other K-beauty brands at similar price points
Brand Website
4.6
Rating
300+
Reviews
Main complaint: Shipping only through Amazon fulfillment, limited direct purchase options
10

Pros & cons

BALANCED

Praised

  • Effective dual-acid exfoliation at proven concentrations (7% AHA + 0.5% BHA)
  • Generous 200ml size offers excellent value for money
  • Minimal, clean 12-ingredient formula with no fillers
  • Fungal acne safe with no oils, ferments, or fatty acids
  • Noticeable improvement in blackheads and skin texture within weeks
  • Aloe vera base soothes skin during exfoliation
  • Vegan, cruelty-free, and KFDA certified production

Criticized

  • Can cause significant tingling or stinging, especially for acid beginners
  • Not suitable during pregnancy due to salicylic acid content
  • Leaves a slight tacky feeling; not ideal under makeup
  • Too strong for very sensitive or rosacea-prone skin
  • Basic packaging compared to other K-beauty brands
  • May cause purging during the first 1–2 weeks of use
11

Budget-friendly alternatives (dupes)

DUPES
88% Match
Salicylic Acid 2% Solution
$8.70
Budget Pick

Same 7% glycolic acid concentration in a larger 240ml bottle. Lacks BHA and niacinamide, so no pore-penetrating action. Contains aloe, ginseng, and amino acids. Not fungal acne safe due to Polysorbate 20.

70% Match
AHA/BHA Clarifying Treatment Toner
$20.00
Similar Price

Much gentler formula with only 0.1% glycolic acid plus betaine salicylate. Better for sensitive skin and daily use but far less effective for exfoliation. Spray bottle format. 150ml size.

72% Match
AHA BHA PHA 30 Days Miracle Toner
$18.00
Similar Price

Uses triple-acid approach (AHA + BHA + PHA) with tea tree and niacinamide. Lower individual acid concentrations. Can be more drying. 150ml bottle. Not fungal acne safe.

12

Comparison with competitors

SIDE-BY-SIDE
Glycolic Acid 7%
AHA Concentration Glycolic Acid 7%
BHA Concentration None
Bonus Actives Amino acids, Ginseng
Size 240ml
pH 3.6
Price per 100ml ~$3.60
Fungal Acne Safe No (Polysorbate 20)
AHA/BHA Clarifying Treatment Toner
AHA Concentration Glycolic Acid 0.1%
BHA Concentration Betaine Salicylate (low)
Bonus Actives Allantoin, Panthenol
Size 150ml
pH 4.0
Price per 100ml ~$13.30
Fungal Acne Safe Yes
AHA BHA PHA 30 Days Miracle Toner
AHA Concentration Low (undisclosed)
BHA Concentration Salicylic Acid (low)
Bonus Actives Niacinamide 2%, Tea Tree
Size 150ml
pH 5.5
Price per 100ml ~$12.00
Fungal Acne Safe No
13

Storage & shelf life

12 MONTHS
Period After Opening (PAO)

12 months after opening

Storage

Store in a cool, dry place away from direct sunlight. Keep tightly sealed after each use. Refrigeration is not required but can enhance the soothing effect.

Packaging

Plastic bottle with screw cap in paper box. Reinforced cosmetic-grade container (not glass).

Travel Friendly

No — 200ml exceeds the 100ml carry-on liquid limit. Decant into a smaller travel bottle for flights.

13

Frequently asked questions

FAQ

This toner contains 0.5% Salicylic Acid (BHA), which most dermatologists recommend avoiding during pregnancy and breastfeeding. While the concentration is low and topical, the general medical consensus advises caution with any salicylic acid products. Glycolic acid is generally considered safe during pregnancy at this concentration, but consult your healthcare provider before using any chemical exfoliant while pregnant or nursing.

Yes, this toner is fungal acne safe. It contains no ferments, fatty acids, fatty acid esters, polysorbates, or oils that feed malassezia yeast. The minimal 12-ingredient formula avoids all common fungal acne triggers, making it one of the best exfoliating toner options for those dealing with fungal acne.

Avoid using this toner in the same routine as retinol, vitamin C serums, or other AHA/BHA products to prevent over-exfoliation and irritation. Instead, alternate them on different days or use this toner in your PM routine and vitamin C in your AM routine. Wait at least 30 minutes between acid products if you must layer them. Never combine with other exfoliating acids in the same session.

This toner is best suited for oily, combination, and acne-prone skin types. The dual AHA+BHA formula effectively targets excess sebum, clogged pores, and textural irregularities. Normal skin can also benefit from 2–3 times weekly use. Those with dry or sensitive skin should proceed with caution, starting once a week and gradually increasing frequency.

Most users notice smoother skin texture within the first week. Blackheads and pore congestion typically improve within 2–3 weeks of consistent use. Significant improvements in skin tone, dark spots, and overall clarity usually become visible after 4–6 weeks. For anti-aging benefits like collagen stimulation, expect results after 2–3 months of regular use.

Apply this toner as the first step after cleansing, on dry skin. It goes before essences, serums, moisturizers, and sunscreen. Use it 2–3 times per week in your PM routine. On non-exfoliating days, substitute with a hydrating toner. Always follow with sunscreen the next morning, as AHA increases sun sensitivity.

No, this toner has a comedogenic rating of 1/5 (very low). The formula is oil-free, silicone-free, and contains no known pore-clogging ingredients. In fact, the AHA and BHA actively work to unclog existing pore congestion. It is also fungal acne safe, making it one of the cleanest exfoliating toners available.

The toner has a Period After Opening (PAO) of 12 months. The generous 200ml bottle typically lasts 3–4 months when used 2–3 times per week. Store it in a cool, dry place away from direct sunlight and keep the cap tightly sealed to maintain the stability of the glycolic acid formula.

— Skincarisma verdict
4.3 / 5 ★★★★☆

Verdict: The Cos De BAHA GS AHA BHA Facial Toner delivers serious exfoliating power at a budget-friendly price point. With 7% glycolic acid, 0.5% salicylic acid, and niacinamide in a clean 12-ingredient formula, it punches well above its weight class. The fungal acne-safe, oil-free formulation makes it a standout in the K-beauty acid toner category. It is best suited for oily, combination, and acne-prone skin types looking to tackle blackheads, texture, and dullness. Beginners to chemical exfoliants should start slowly, as the pH 3.5 formula is potent. Paired with consistent sunscreen use, this toner delivers visible results in as little as 1–2 weeks — making it one of the best value exfoliating toners available.

Product Overview

question
lightbulb What are Quick Product Notes?

Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.

muscle Pro Tip Alert!

Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.

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Quick Product Notes

Click on icons for more information
question
lightbulb What are Notable Effects & Ingredients?

Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.

We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.

muscle Pro Tip Alert!

Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.

Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you

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Notable Effects & Ingredients

anti-aging Anti-Aging from 2 ingredient(s):
Glycolic Acid Niacinamide
brightening Brightening from 3 ingredient(s):
Glycolic Acid Niacinamide Salicylic Acid
wound Promotes Wound Healing from 2 ingredient(s):
Glycolic Acid Niacinamide
ache Ache-fighting from 3 ingredient(s):
Glycolic Acid Niacinamide Salicylic Acid
question
lightbulb What are Ingredients Related to Skin Type?

Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.

We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.

muscle Pro Tip Alert!

A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.

One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!

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Ingredients Related to Skin Types

Click on icons for more information
dry-skin Dry Skin
oily-skin Oily/Acne-Prone Skin
1 2
sensitive-skin Sensitive Skin
question
lightbulb What is the Ingredient Safety Breakdown?

Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.

muscle Pro Tip Alert!

EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.

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Ingredient Safety Breakdown

EWG Health Ratings
Low risk
Medium risk
High risk
Unknown risk
45% 18% 36%

Product ingredient list

Showing first 5 of 11 ingredients
EWG CIR Ingredient Name & Cosmetic Functions Notes
0 Unknown
Aloe Barbadensis Leaf Extract
Emollient, Humectant, Skin Conditioning
Hydrating
Redness
Irritation
4 B
Glycolic Acid
Ph Adjuster, Buffering Agent, Exfoliant, Exfoliating, Buffering
brightening Brightening
ache Ache-fighting
anti-aging Anti-Aging
Promotes Wound Healing
Dark Spots
Texture
Pores
1 Unknown
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
1 A
1,2-Hexanediol
Solvent, Skin Conditioning
Hydrating
1 A
Niacinamide
Skin Conditioning, Hair Conditioning, Smoothing
brightening Brightening
ache Ache-fighting
anti-aging Anti-Aging
Promotes Wound Healing
Redness
Irritation
Dark Spots
Pores
VIEW ALL INGREDIENTS