How to incorporate an AHA/BHA exfoliant into your Korean routine?

The world of kbeauty is based on a respectful and progressive approach to skincare. Rather than masking imperfections or resorting to harsh solutions, Korean skincare prioritizes gentleness, consistency, and long-term effectiveness. Chemical exfoliation is one of these key steps that visibly improve skin texture, prevent blemishes, and achieve a radiant complexion.

Among exfoliating agents, AHAs (Alpha-Hydroxy Acids) and BHAs (Beta-Hydroxy Acids) are the star ingredients. But how can you use them without damaging your skin? How often? And most importantly, what are the best products to incorporate into a Korean routine ?

AHA & BHA: Understanding the Difference Between Exfoliants

AHAs and BHAs are gentle exfoliating acids that help unclog pores, smooth skin, and improve overall radiance. However, their mechanisms of action are different, and it's essential to understand them well to make the right choice for your skin type.

AHA – Surface action

AHAs , such as glycolic acid or lactic acid, are water-soluble. The action of this exfoliant is on the surface : they remove dead skin cells, revealing brighter and smoother skin. They are particularly useful for:

• Even out skin tone
• Smooth fine lines
• Reduce pigment spots
• Boost cell renewal

AHAs are well suited for normal to dry skin , or for people with dull skin or those prone to hyperpigmentation.

BHA – Deep action

BHAs , like salicylic acid, are fat-soluble. This means they penetrate deeper into pores, dissolve excess oil, and remove impurities at the root. BHA is an ideal exfoliant for:

• Oily, acne-prone skin
• Blackheads and whiteheads
• Enlarged pores
• Skin inflammations

Why is exfoliation essential in Korean skincare?

The Korean routine is based on several steps, often between 5 and 10, each with a specific role. Exfoliation isn't a daily routine, but it's essential for:

• Boost the effectiveness of other treatments (better penetration of active ingredients)
• Avoid clogged pores
• Lighten the complexion
• Prevent the appearance of pimples

By removing dead skin cells from the surface of the skin or inside pores, a healthier base is created that allows serums, creams and essences to work more deeply.

How often should I use an AHA or BHA?

One of the foundations of kbeauty is to never harm the skin. Chemical exfoliants should be used sparingly to avoid irritation.

• Beginner: 1 time per week
• Accustomed skin: up to 2-3 times per week
• Sensitive skin: start with 1 time every 10 days

It is also crucial to monitor skin tolerance and never use several acids or powerful ingredients at the same time (e.g. AHA + BHA + retinol).

The right time to exfoliate

🌙 Preferably in the evening

AHAs and BHAs make the skin more sensitive to UV rays. This is why it is recommended to use them in the evening , followed by moisturizing and soothing care.

🕒 Before serums

Exfoliation comes after cleansing but before moisturizers or serums. It's best to apply exfoliants to clean, dry skin for best results.

Steps of the Korean routine with built-in exfoliation

Here is an example of a Korean routine incorporating an exfoliant, with products that you can find in your store:

1. Makeup remover oil
   → Skin1004 Madagascar Centella Light Cleansing Oil : removes makeup, sunscreens and sebum.
2. Gentle cleanser
   → Low pH Good Morning Gel Cleanser from Cosrx : gently cleanses without unbalancing the pH.
3. AHA or BHA exfoliant (depending on your skin type, 1 to 3 times/week)
   → AHA 7 Whitehead Power Liquid or BHA Blackhead Power Liquid from Cosrx
4. Soothing Toner
   → Green Plum Refreshing Toner by Beauty of Joseon : balances pH and soothes after exfoliation.
5. Repairing serum
   → Propolis Light Ampoule from Cosrx : hydrates, calms and repairs the skin barrier.
6. Light moisturizer
   → Dynasty Cream by Beauty of Joseon : nourishes without clogging.
7. SPF (morning)
   → Relief Sun: Rice + Probiotics SPF50+ PA++++ from Beauty of Joseon

The most popular AHA/BHA exfoliants

▸ Cosrx AHA 7 Whitehead Power Liquid

• 7% glycolic acid
• Light texture
• Helps smooth skin, reduce dark spots and even out skin tone

Suitable for beginners with normal to dry skin, this exfoliant can be applied with a cotton pad or directly with your fingers.

▸ Cosrx BHA Blackhead Power Liquid

• 4% BHA (Betaine Salicylate)
• Ideal for blackheads, clogged pores and oily skin

A cult product for blemish-prone skin, it works deep down while remaining gentle on the skin.

How to use an AHA/BHA exfoliant correctly: mistakes to avoid

• Not moisturizing enough afterward : the skin needs comfort and repair.
• Combining several acids : limit superpositions to avoid reactions.
• Using it every day : it attacks the skin unnecessarily.
• Do not apply SPF the next day : acids make the skin more sensitive to the sun.

Visible, but progressive results

With AHA and BHA exfoliants , the results are not instant, but they are long-lasting. After a few weeks:

• The skin texture becomes refined
• Pores tighten
• The complexion is more radiant
• The buttons are shrinking

Kbeauty relies on consistency and patience, and that's what makes this method so strong.

Additional tips to maximize the effects

• Store your exfoliant in a cool place to prevent degradation.
• Avoid hot water on the face after application, it can irritate.
• Use a hydrating mist or toner during the day to maintain skin balance.

How to choose between AHA, BHA or both?

In conclusion

Incorporating an AHA or BHA exfoliant into your Korean skincare routine means choosing clearer, brighter, and healthier skin. Korean skincare teaches the art of listening to your skin, treating it with care, and respecting its natural rhythm. Cosrx products, like the AHA 7 Whitehead Power Liquid or the BHA Blackhead Power Liquid , are perfect for starting or optimizing your exfoliation routine.

At beautylau.fr , you'll find all these carefully selected authentic Korean skincare products, along with tips for tailoring your routine to your needs. You can also take our personalized skincare quiz to discover the products best suited to your skin type and goals.