If you have ever looked for a solution to clogged pores, blackheads or uneven skin texture, you have probably come across two abbreviations again and again: AHA and BHA. Both are chemical exfoliants. Both can help remove dead skin cells. And both are commonly found in products designed to make skin look smoother and more refined.

But they are not exactly the same.

AHA works primarily at the surface of the skin, while BHA has different properties that make it particularly interesting when excess sebum, blackheads and clogged pores are part of the problem.

So which one should you choose?

The answer depends less on which acid is "better" and more on what your skin actually needs. In this guide, we break down the difference between AHA and BHA, when each one makes sense and why some skincare formulas combine both.

You don’t necessarily have to choose between the two. Some exfoliating treatments combine AHA and BHA to address different aspects of skin congestion and texture at the same time. The DS V-LINE 40 Deep Peeling Serum, for example, combines 10% AHA with 2% BHA — a combination we’ll come back to later in this guide.

What Is AHA?

AHA stands for alpha hydroxy acid.

AHAs are a group of water-soluble acids commonly used in skincare to exfoliate the outer surface of the skin. They help loosen the connections between dead surface skin cells, allowing them to shed more easily. This makes AHAs particularly useful when the skin looks dull, rough or uneven.

Common AHAs include:

• Glycolic acid
• Lactic acid
• Mandelic acid
• Citric acid

Although they belong to the same family, individual AHAs can differ in molecular size, strength and how they feel on the skin.

What Does AHA Do for the Skin?

AHA is commonly used in skincare routines focused on concerns such as:

• rough skin texture
• dull-looking skin
• dead skin cell buildup
• uneven-looking tone
• visible signs of photoageing
• a lack of radiance

Because AHA primarily exfoliates the surface, it can help reveal fresher-looking skin underneath accumulated dead cells. That does not mean stronger or more frequent exfoliation will automatically give better results. AHAs can also cause irritation and increase sun sensitivity, so the overall formulation and frequency of use matter.

What Is BHA?

BHA stands for beta hydroxy acid. In skincare, the BHA you will encounter most often is salicylic acid.

Unlike AHAs, salicylic acid is oil-soluble. This gives it an important advantage when clogged pores and excess sebum are your main concerns. Instead of focusing only on the skin's surface, salicylic acid can work in oily areas around the hair follicles and pores. This is why it has become such a familiar ingredient in skincare for blackheads, whiteheads and congestion-prone skin.

What Does BHA Do for the Skin?

BHA is particularly relevant for concerns such as:

• clogged pores
• blackheads
• whiteheads
• oily skin
• excess sebum
• congestion-prone areas
• uneven skin texture associated with clogged pores

Salicylic acid also exfoliates, so BHA can contribute to smoother-looking skin while targeting pore congestion at the same time.

AHA vs. BHA: What's the Main Difference?

At first glance, AHA and BHA seem very similar because both exfoliate the skin. The main difference is where their properties make them most useful.

AHA primarily focuses on the surface of the skin.

BHA is particularly useful when oil and clogged pores are involved.

A simple way to think about the difference is:

If your main concern is rough, dull-looking skin, an AHA may be particularly useful. If blackheads and clogged pores are the issue, BHA may be more relevant. And if your skin shows both uneven texture and congestion, a combination can make sense.

Is AHA or BHA Better for Clogged Pores?

If clogged pores are your primary concern, BHA — particularly salicylic acid — generally has the more direct role. Because salicylic acid is oil-soluble, it is particularly suited to skincare routines where excess sebum and material inside the pores contribute to congestion. That is also why salicylic acid is commonly recommended for blackheads and whiteheads. However, clogged pores rarely exist in isolation.

You may also notice rough texture, dullness or dead skin cell buildup on the surface. In that case, using only BHA may not address every aspect of how the skin looks and feels. This is where AHA can complement BHA.

For a broader look at why pores become clogged and how to build a routine around congestion and rough texture, read our complete guide to clogged pores and uneven skin texture.

Is AHA or BHA Better for Uneven Skin Texture?

If your main concern is rough or uneven-looking surface texture, AHA is often particularly relevant.

AHAs such as glycolic, lactic and mandelic acid help exfoliate dead cells from the outer surface of the skin. This can make the complexion appear smoother, fresher and more refined. But once again, the cause of the texture matters. If the uneven texture mainly comes from clogged pores and small bumps associated with congestion, BHA may also play an important role. This is why simply asking "AHA or BHA?" can sometimes be too narrow.

Instead, ask:

What is causing my skin texture?

Dryness and dehydration require a very different approach from blackheads and congestion.

Glycolic Acid, Lactic Acid and Mandelic Acid: Are They All AHA?

Yes. Glycolic, lactic and mandelic acid all belong to the AHA family, but they are not identical.

Glycolic Acid

Glycolic acid is one of the most widely used AHAs. It is commonly included in products designed to exfoliate the skin's surface and improve the appearance of roughness, dullness and uneven texture.

Lactic Acid

Lactic acid is also an AHA and is frequently used in exfoliating skincare formulations. Like other AHAs, it supports the removal of dead surface skin cells.

Mandelic Acid

Mandelic acid belongs to the same family and is another popular ingredient in chemical exfoliation. You will often find several AHAs combined within one formula rather than relying on only a single acid. The important thing is not simply how many acids a product contains, but how the entire formula has been designed and how it is intended to be used.

Why Is Salicylic Acid So Popular for Clogged Pores?

Salicylic acid has become almost synonymous with pore-focused skincare for a reason. Its oil-soluble properties make it particularly useful in areas where sebum and pore congestion are common.

Think about areas such as:

• the nose
• the forehead
• the chin
• other oily parts of the face

Salicylic acid can help exfoliate while working around oil-containing hair follicles and pores. This makes it especially relevant when blackheads, whiteheads and congestion are more important concerns than simple surface dullness. That does not mean every person with visible pores needs to use salicylic acid every day.

Pores are normal structures of the skin, and skincare cannot permanently erase them. The goal is to keep congestion under control and support a more refined-looking complexion and not to eliminate pores completely.

Can You Use AHA and BHA Together?

Yes, AHA and BHA can be used together. In fact, some skincare formulas deliberately combine both types of exfoliating acids. The reasoning is straightforward:

AHA focuses more heavily on dead cells and texture at the skin's surface, while BHA is particularly useful when pore congestion and sebum are involved. Combining them can therefore provide a more comprehensive exfoliating approach.

But there is an important distinction between: using a professionally formulated AHA + BHA product and layering several separate acid products yourself.

Adding an AHA toner, a BHA serum, an exfoliating cleanser and a peeling treatment into the same routine does not necessarily improve your results. It can simply increase the risk of irritation.

More Exfoliation Doesn't Mean Better Skin

When skin feels rough or pores appear clogged, it is easy to think that the solution must be more exfoliation. But skin does not need to be exfoliated constantly.

Over-exfoliation can leave it feeling:

• tight
• dry
• uncomfortable
• sensitive
• irritated

You may even end up with skin that looks less smooth than it did before. Use acids as one targeted part of your routine rather than making every step exfoliating.

How Often Should You Use AHA or BHA?

There is no universal answer because frequency depends heavily on:

• the specific formula
• the concentration
• your skin
• the other active ingredients you use
• whether the product is leave-on or rinse-off

A low-strength salicylic acid cleanser, for example, is not equivalent to a concentrated multi-acid peeling treatment. Always follow the instructions for the individual product.

If you already use retinoids, other exfoliating acids or strong active products, consider the routine as a whole before adding another exfoliant. The goal is not to use the highest possible number of active ingredients. It is to build a routine your skin can tolerate consistently.

AHA and BHA in the Same Formula: When Does It Make Sense?

A combined formula can be particularly useful when your concerns overlap. For example, imagine your skin has: visible blackheads + clogged pores + rough surface texture + dullness

BHA addresses the pore-focused side of the problem, while AHA contributes additional surface exfoliation. Instead of buying several individual acid products, a combined formula allows these ingredients to be incorporated into one defined treatment.

This can also make your routine easier to understand. You know which step is your exfoliation step and the rest of your routine can remain relatively simple.

A Targeted AHA + BHA Option: DS V-LINE 40 Deep Peeling Serum

For skincare routines focused on both clogged pores and uneven skin texture, the DS V-LINE 40 Deep Peeling Serum combines both acid families in one exfoliating treatment. The formula contains:

10% AHA

• Glycolic Acid
• Lactic Acid
• Mandelic Acid

and

2% BHA

• Salicylic Acid

The AHA complex is designed to help remove dead skin cells from the surface, while salicylic acid adds a pore-focused BHA component. This makes the formula particularly relevant for concerns such as:

• clogged pores
• blackheads
• dead skin buildup
• excess sebum
• uneven-looking texture
• dull-looking skin

Rather than using several separate acid products, the serum combines AHA and BHA in one targeted exfoliating step.

Buy the DS V-LINE 40 Deep Peeling Serum →

How to Use the DS V-LINE 40 Deep Peeling Serum

Because this is a concentrated exfoliating treatment rather than an everyday serum, it should be used according to its specific instructions. Apply a thin layer to clean, dry skin in the evening while avoiding the eye area.

Leave the product on the skin for a maximum of 10 minutes, then rinse thoroughly with water.

DS V-LINE recommends using the treatment twice per week with at least three days between applications. Do not leave an acid peel on longer than recommended in an attempt to increase its effect. More time does not necessarily mean better exfoliation.

What Should You Use After AHA and BHA?

After using a stronger exfoliating treatment, simplicity is usually a good strategy. Your routine does not need another collection of strong active ingredients immediately afterward.

Instead, focus on: hydration, moisturization and barrier-conscious skincare

If you are interested in why protecting the skin barrier matters — especially when using exfoliating acids — you can also read our guide to strengthening and supporting the skin barrier.

This is an important relationship to understand. Exfoliation is designed to remove dead surface cells, but good skincare still needs to maintain a comfortable, well-supported skin barrier.

AHA vs. BHA for Blackheads: Which One Should You Choose?

For blackheads specifically, BHA — especially salicylic acid — generally has the clearer connection.

A blackhead is a type of clogged pore, and salicylic acid is widely used in skincare because it helps exfoliate and unclog pores.

AHA can still be useful when blackheads appear alongside rough surface texture or dullness.

This is another situation where the concerns overlap rather than fitting neatly into one category.

If blackheads are your only concern, you may not necessarily need a strong combined peel.

If you are dealing with blackheads and uneven texture, however, using both AHA and BHA within an appropriate formulation may make more sense.

AHA vs. BHA for Oily Skin

BHA is often particularly interesting for oily skin because of the relationship between salicylic acid, sebum and pore congestion. But oily skin still needs hydration.

One common mistake is trying to remove every trace of oil by combining harsh cleansers, exfoliants and drying products. Skin does not need to feel stripped to be properly cleansed.

If your routine contains BHA or other strong actives, balancing them with gentle cleansing and appropriate moisturizing products can help make the routine more sustainable.

What About Sensitive Skin?

Sensitive or easily irritated skin requires more caution with exfoliating acids. Both AHA and BHA can cause irritation, particularly at higher concentrations or when several exfoliating products are combined. If your skin already feels irritated, inflamed or uncomfortable, introducing a strong peeling treatment may not be the right first step.

And if you have a persistent skin condition or significant acne, professional dermatological advice may be more appropriate than simply adding stronger cosmetic acids.

Skincare should support your skin — not become a test of how much irritation you can tolerate.