AHAs, BHAs, PHAs, and LHAs are all chemical exfoliants. They're found in many products, but how do I differentiate them? How do I know if they're all right for my skin type? And when should I use them?

After reading this article, these acids will no longer hold any secrets for you! You will finally be able to create your personalized routine, adapted to your needs ✨

🌿AHA (Alpha Hydroxy Acids)

AHAs are usually derived from fruit, milk, or sugarcane.

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Chemical exfoliation works on the surface by dissolving dead skin cells, leaving it smoother and brighter. AHAs help with hydration and stimulate cell renewal.

For what problem?

AHAs are recommended for dull complexion, hyperpigmentation, wrinkles or fine lines, and dry or dehydrated skin.

Attention !

It is recommended to use them in the evening to avoid exposing fragile skin to external agents. These acids are photosensitizing, so it is essential to protect yourself with sunscreen the next day to avoid irritation. If you have sensitive skin, it is advisable to introduce them into your routine little by little. You can also choose lactic and mandelic acids to start with, which are less powerful and therefore less irritating than glycolic acid.

🌿BHA (Beta Hydroxy Acids)

This is usually salicylic acid, which is a derivative of aspirin.

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BHAs exfoliate on the surface AND inside the pores. It dissolves excess oil and impurities embedded in the pores. It is also antibacterial and anti-inflammatory.

For what problem?

Salicylic acid is ideal for oily or combination skin prone to acne, enlarged pores and blackheads.

Attention !

Although BHAs are less irritating than AHAs, they can still dry out the skin and should therefore be combined with a moisturizer. They are best used in the evening, and sunscreen should be applied the next morning.

🌿PHA (Polyhydroxy Acids)

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PHAs exfoliate the skin 's surface. Composed of larger molecules than AHAs, PHAs penetrate less deeply and therefore irritate the skin's surface less. They are also highly hydrating and antioxidant.

For what problem?

These acids are better tolerated by sensitive and reactive skin. If you're new to exfoliants, we recommend starting with PHAs. They're also recommended for rosacea and mild eczema.

Attention !

Always apply sunscreen to protect your skin after use. For deep pigmentation spots, these acids are often not enough.

🌿LHA (Lipo Hydroxy Acid)

LHAs are actually derivatives of BHA.

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LHA dissolves excess sebum and impurities in pores like BHA, except it works more gradually and absorbs more slowly. It is therefore less irritating to the skin. LHA also has antioxidant and sebum-regulating properties.

For what problem?

These acids are recommended for sensitive, acne-prone skin and for daily exfoliation.

Attention !

Even though it is less powerful and less aggressive for the skin, LHA remains an exfoliant and must therefore always be used with sunscreen.

▶️ Since these acids target different issues, it is not uncommon to find products composed of several of these exfoliants.