AHA and BHA: The star exfoliants for radiant skin with COSRX

In the world of skincare, the terms AHA and BHA come up a lot—and rightly so. These two types of exfoliating acids have revolutionized facial skincare, particularly for skin prone to blemishes, dullness, or enlarged pores. Among the brands that excel at using these active ingredients, COSRX stands out as a must-have. With its gentle, effective, and minimalist formulations, Cosrx makes it easy to incorporate these exfoliating acids into a routine suitable for all skin types.

COSRX: a brand designed for real skin

What sets COSRX apart from other Korean brands is its commitment to formulating skincare products focused on effectiveness, without the frills. The name COSRX comes from "Cosmetics" + "RX," which perfectly captures its approach: targeted skincare products designed as concrete solutions to skin problems.

Products containing AHAs and BHAs aren't just for skincare experts. Thanks to Cosrx , even beginners can incorporate these exfoliating acids without fear of irritation, as long as they follow the recommendations. The brand also offers lightweight textures, free of fragrance and alcohol, to respect the skin barrier.

Finally, it is also a responsible brand, keen to offer cruelty-free products, often vegan, and suitable for sensitive skin. It perfectly embodies the K-beauty philosophy: gentleness, visible results and listening to individual needs.

What are AHAs and BHAs?

AHA – Alpha Hydroxy Acids

These are water-soluble acids derived from fruit or milk, such as glycolic, lactic or mandelic acid. Their action is mainly on the surface , where they eliminate dead cells , stimulate cell renewal and improve skin radiance.

Their benefits :

• Refine skin texture
• Lighten the complexion
• Reduce pigment spots
• Improve texture and elasticity

They are ideal for dry, dull or mature skin , as they also provide a moisturizing effect by attracting water to the skin's surface.

BHA – Beta Hydroxy Acids

The most well-known BHA is salicylic acid . They are fat-soluble , which allows them to penetrate deep into pores to dissolve sebum and prevent blemishes .

Their benefits :

• Unclogs pores
• Prevent blackheads and pimples
• Regulate sebum production
• Soothe inflammation

It is particularly recommended for oily, combination or acne-prone skin .

Why integrate them into your routine?

Chemical exfoliants offer a gentler alternative to mechanical (grain) scrubs, which are often too harsh. When used regularly, they:

• Stimulate cell regeneration
• Promote better absorption of care
• Fight the signs of aging
• Improve overall radiance and clarity of the complexion

The correct dosage and frequency are essential to benefit from their effects without irritating the skin.

COSRX: The Korean brand expert in exfoliating acids

COSRX is a Korean brand renowned for its effective skincare products, formulated with few ingredients but highly concentrated in active ingredients. True to its minimalist philosophy, it has been able to integrate AHAs and BHAs into products that respect even sensitive skin.

Here are the best COSRX exfoliating acid products to check out:

1. AHA/BHA Clarifying Treatment Toner

A gentle exfoliating toner perfect for daily use . It contains:

• Apple mineral water (rich in AHA)
• Willow Bark Water (natural source of BHA)
• Allantoin and panthenol to soothe

💡 What it does :

• Eliminates dead cells
• Refreshes and balances the skin
• Prepares the skin to receive the following treatments

Suitable for all skin types, even sensitive.

2. AHA 7 Whitehead Power Liquid

A concentrated glycolic acid serum to target:

• Clogged pores
• Whiteheads
• Dull complexion

💡 Please note :
Use 2 to 3 times a week in the evening. Always apply sunscreen the next day.

3. BHA Blackhead Power Liquid

One of the brand's most popular products! Formulated with 4% BHA (salicylic acid) , it:

• Removes blackheads
• Reduces excess sebum
• Smooths out areas with uneven texture

💡 Perfect for oily, combination or acne-prone skin.

4. COSRX The AHA BHA PHA LHA 35 Peel

An intensive peel for fans of advanced exfoliation. It combines:

• AHA for surface exfoliation
• BHA for deep action
• PHA and LHA for a gentle and moisturizing action

💡 Use 1 to 2 times a month. Suitable for skin accustomed to acids.

5. COSRX Refresh AHA BHA Vitamin C Booster Serum

This serum combines:

• AHA and BHA for exfoliation
• Vitamin C for Illumination

💡 Ideal for dull skin with pigmentation spots or uneven texture.

How to use them properly in your routine?

🔹 Frequency :

• 2 to 3 times a week to start with
• Can be used daily as tolerated

🔹 Order of application :

1. Gentle cleanser
2. Tonic (e.g.: COSRX Clarifying Treatment Toner)
3. AHA or BHA serum
4. Moisturizing cream
5. Sun protection in the morning

🔹 Precautions :

• Never combine multiple powerful exfoliants in one routine
• Apply a minimum SPF 30 sunscreen during the day
• Avoid harsh or irritating products at the same time

Who are these products for?

These products are suitable for:

• Those who want to reduce their imperfections
• Those looking to lighten their complexion
• Acne-prone, oily or combination skin
• People with enlarged pores or uneven texture

Their great strength lies in their high tolerance , even for sensitive skin or those new to chemical exfoliation.

To finish

AHAs and BHAs are powerful active ingredients that transform skin when properly integrated into a routine. With gentle, effective, and targeted formulations, Cosrx makes these ingredients accessible to everyone. Whether you're a beginner or an experienced practitioner, their exfoliating treatments will reveal clearer, softer, and brighter skin.

💬 Need personalized advice? Don't hesitate to consult our recommendations or contact us to help you choose the right treatment for your skin!