What Are AHA, BHA, and PHA?

AHA, BHA, and PHA are exfoliating skincare ingredients commonly used in Korean skincare products designed to support smoother-looking and more refined-looking skin.

In K-beauty skincare, these ingredients are especially popular in routines focused on:

• textured-looking skin

• dull-looking skin

• glow-focused skincare

• lightweight exfoliation

• smooth-looking complexion

These exfoliating ingredients are commonly found in:

• toners

• serums

• cleansing pads

• masks

• spot-focused skincare products

Because Korean skincare often focuses on gentle layered routines, many K-beauty brands formulate exfoliating products with hydration-focused ingredients for a more balanced skincare experience.

What Is AHA?

AHA stands for Alpha Hydroxy Acid.

AHAs are commonly used in Korean skincare products focused on:

• smooth-looking skin

• glow-focused skincare

• texture-focused routines

• radiant-looking complexion

Popular AHAs include:

• Glycolic Acid

• Lactic Acid

• Mandelic Acid

Many Korean AHA products feature lightweight formulas suitable for hydration-focused skincare routines.

What Is BHA?

BHA stands for Beta Hydroxy Acid.

The most common BHA used in Korean skincare is:

• Salicylic Acid

BHA products are commonly included in routines focused on:

• oily skin

• combination skin

• lightweight exfoliation

• smooth-looking complexion

Korean BHA skincare products often feature lightweight textures suitable for layered skincare routines.

What Is PHA?

PHA stands for Polyhydroxy Acid.

PHAs are commonly included in Korean skincare products designed for:

• gentle exfoliation

• hydration-focused skincare

• beginner exfoliation routines

• lightweight skincare

Popular PHAs include:

• Gluconolactone

• Lactobionic Acid

PHA products are especially popular in Korean skincare routines focused on hydration and skin comfort.

AHA vs. BHA vs. PHA: What’s the Difference?

AHA

Commonly used in glow-focused Korean skincare routines designed for:

• smooth-looking skin

• radiant-looking complexion

• texture-focused skincare

Best associated with:

• dry skin

• dull-looking skin

• glow-focused skincare

BHA

Frequently included in lightweight Korean skincare products focused on:

• oily skin

• combination skin

• lightweight exfoliation

• refined-looking skin texture

PHA

Popular in hydration-focused and beginner-friendly Korean skincare routines.

Commonly associated with:

• gentle skincare

• lightweight exfoliation

• hydration-focused skincare

• sensitive-feeling skin routines

Why Are Exfoliating Acids So Popular in Korean Skincare?

Exfoliating ingredients became increasingly popular in Korean skincare because many consumers are interested in:

• smooth-looking skin

• lightweight skincare

• “glass skin” routines

• layered skincare

• minimalist skincare

Many Korean skincare brands combine AHA, BHA, or PHA with:

• hyaluronic acid

• centella asiatica

• panthenol

• niacinamide

• ceramides

to create skincare products designed to support hydration-focused skincare routines.

Who Are AHA, BHA, and PHA Best For?

AHA

Commonly used by people with:

• dry skin

• dull-looking skin

• texture-focused skincare routines

BHA

Commonly used by people with:

• oily skin

• combination skin

• lightweight skincare preferences

PHA

Popular for:

• beginner skincare routines

• hydration-focused skincare

• gentle exfoliation-focused routines

How to Use AHA, BHA, or PHA in Your Routine

Exfoliating acids are commonly used in:

• evening routines

• lightweight exfoliation routines

• targeted skincare routines

Typical routine order:

1. Cleanser

2. AHA/BHA/PHA toner or serum

3. Hydrating serum

4. Moisturizer

Many Korean skincare users pair exfoliating products with hydration-focused skincare ingredients.

What Ingredients Pair Well With AHA, BHA, and PHA?

Hyaluronic Acid

Popular combination in hydration-focused skincare routines.

Centella Asiatica

Frequently paired in lightweight and comfort-focused skincare products.

Panthenol

Commonly included in hydration-focused Korean skincare products.

Ceramides

Popular in skin barrier-support skincare routines.

Niacinamide

Frequently used in balanced-looking skincare routines.

What Should You Avoid Mixing With Exfoliating Acids?

If you are new to exfoliating skincare ingredients:

• gradually introduce products

• avoid layering multiple strong active ingredients simultaneously

• patch test first

Some skincare users prefer building routines carefully when combining:

• retinoid products

• exfoliating acids

• strong resurfacing-focused skincare

Always follow product instructions carefully.

Korean Skincare Products With AHA, BHA, and PHA

These exfoliating ingredients are commonly found in:

• toners

• cleansing pads

• serums

• overnight treatments

• lightweight exfoliation products

Many Korean skincare brands now offer dedicated exfoliation-focused skincare collections.

Is PHA More Beginner-Friendly?

Many Korean skincare users consider PHA products more suitable for:

• hydration-focused skincare

• lightweight exfoliation

• beginner skincare routines

However, skincare experiences vary from person to person.

Frequently Asked Questions About AHA, BHA, and PHA

What is the difference between AHA and BHA?

AHA is commonly associated with glow-focused and texture-focused skincare, while BHA is frequently included in lightweight skincare routines for oily and combination skin.

Is PHA good for beginners?

Many Korean skincare users choose PHA products as part of beginner-friendly exfoliation routines.

Can exfoliating acids be used every day?

Usage frequency depends on the specific product and product instructions.

Are exfoliating acids popular in Korean skincare?

Yes. AHA, BHA, and PHA remain some of the most important exfoliating ingredient categories in modern K-beauty skincare.

Final Thoughts

AHA, BHA, and PHA continue to be essential ingredients in Korean skincare thanks to their compatibility with glow-focused and hydration-focused skincare routines.

As Korean skincare trends continue evolving toward “glass skin,” lightweight layering, and ingredient-focused skincare in 2026, exfoliating acids remain one of the most important skincare categories in K-beauty.

Whether you are building a beginner Korean skincare routine or exploring advanced exfoliation-focused skincare, understanding the differences between AHA, BHA, and PHA can help you build a more balanced K-beauty routine.

Check our TOP recommendations - the Best Korean skincare products with AHA, BHA, PHA.