AHA, BHA, PHA, and LHA are exfoliating acids used in skincare to address different skin concerns, from clogged pores and blackheads to dark spots, uneven skin texture, and dullness. The main differences lie in how they work, their exfoliating action, and which skin types they are best suited for.

AHA acids are particularly beneficial for dark spots, uneven texture, and dull skin; BHA acids target clogged pores, blackheads, and excess sebum; PHA acids offer gentler exfoliation for sensitive skin; while LHA acids help improve the appearance of pores and skin texture through gradual, oil-soluble exfoliation.

Choosing the right exfoliating acid can help smooth skin texture, unclog pores, even out skin tone, and restore radiance. However, using an exfoliant that is too strong or applying acids too frequently can lead to dryness, stinging, redness, and a weakened skin barrier.

In this comparison guide, we’ll explain the differences between AHA, BHA, PHA, and LHA, how to choose the right acid for your skin type and concerns, how often to use exfoliating acids, and which ingredient combinations are best avoided.

You’ll also discover examples of exfoliating acid products available at MoonGlow, making it easier to build a skincare routine tailored to your skin’s needs.

AHA vs BHA vs PHA vs LHA: Key Differences at a Glance

There is no single exfoliating acid that is universally better than the others. The best acid for your skin is the one that addresses your specific skin concerns and is well tolerated by your skin.

The recommended frequency of use depends on the acid concentration, formulation, pH level, product type, and your skin’s individual tolerance.

These frequencies are general guidelines, not universal rules. Some low-concentration formulas are designed for more frequent use, while intensive chemical peels should be used much less often.

What Does an Evening Skincare Routine with AHA, BHA, PHA, or LHA Look Like?

A simple evening routine may look like this:

1. Cleansing. Remove makeup and sunscreen, then gently cleanse your skin.

2. Exfoliation. Apply your AHA, BHA, PHA, or LHA product according to the manufacturer’s instructions.

3. Hydrating or soothing serum. Choose a formula with ingredients such as:

• hyaluronic acid;
• Centella Asiatica;
• panthenol;
• beta-glucan;
• niacinamide, if well tolerated by your skin.

4. Moisturizer. Choose a formula that helps maintain and support your skin’s protective barrier.

In the morning: Apply SPF sunscreen every day, especially when your skincare routine includes exfoliating acids.

Important: The advice to “avoid using these ingredients together” does not necessarily mean they are chemically incompatible. In most cases, the main concern is the cumulative risk of skin irritation.

AHA/BHA + Retinol or Retinal

Exfoliating acids and retinoids can both be part of your overall skincare routine. However, beginners are generally advised to use them on separate evenings.

For example: Monday – exfoliating acid, Tuesday – hydrating skincare routine, Wednesday – retinol/retinal.

This approach makes it easier to monitor your skin’s tolerance and minimize the risk of irritation.

Using Multiple Exfoliants on the Same Evening

Combining an AHA toner, BHA serum, exfoliating pads, and a chemical peel does not necessarily make your skincare routine more effective. Instead, it may increase the risk of:

• stinging;
• flaking and peeling;
• redness;
• increased skin sensitivity;
• damage to the skin barrier.

Exfoliating Acids + Benzoyl Peroxide

Both ingredients can be used in skincare routines for acne-prone skin, but applying them together may be too harsh for some people. If you’re just starting out, introduce them separately.

The beauty of a well-balanced skincare routine lies in consistency, harmony, and choosing products that truly meet your skin’s needs.

At moonglow.md, you’ll find a carefully curated selection of skincare products, from formulas with active ingredients to solutions designed to hydrate, soothe, protect, and maintain healthy-looking skin.

Your favorite products can be ordered online, with delivery throughout the Republic of Moldova, making it easy and convenient to maintain your skincare routine.

Explore MoonGlow’s selection and discover products that transform everyday skincare into a thoughtful, effective, and enjoyable beauty ritual.