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AHA

AHA (alpha-hydroxy acids) are naturally derived exfoliating actives, renowned for their ability to enhance skin texture and radiance. Learn more about these active ingredients, their role in cellular renewal and how they differ from BHAs and PHAs.
Contre-indications, effets secondaires de l'acide mandélique.
Exfoliating actives
4 min of reading
Are there any contraindications to the use of mandelic acid?

Primarily used in professional chemical peels, mandelic acid is now utilised in over-the-counter skincare products, valued for its exfoliating properties. It is particularly used to improve acne, hyperpigmentation, and skin ageing. It is considered the gentlest of all AHAs and thus can be safely used by a wide range of skin types. But does it truly have no side effects?

Quand utiliser l'acide mandélique ?
Exfoliating actives
4 min of reading
When should mandelic acid be used?

Mandelic acid, known by the INCI name "Mandelic acid", is an AHA. It is derived from bitter almonds. This fruit acid can be of natural or synthetic origin. It is valued for its benefits to the skin and hair. If you wish to incorporate a treatment containing this acid into your beauty routine, here is what you need to know.

Soins à base d'acide mandélique.
Exfoliating actives
7 min of reading
Mandelic Acid: What are the treatments based on this fruit acid?

Recently, mandelic acid treatments are becoming increasingly popular. Gentle and effective, it delicately exfoliates the skin whilst also possessing anti-bacterial and anti-inflammatory properties. Let's explore together the various formulas that mandelic acid has been incorporated into.

Dangers d'une application topique d'acide tartrique.
Exfoliating actives
6 min of reading
Is tartaric acid dangerous for the skin?

Tartaric acid is present in many exfoliating skin care products. Its use in dermo-cosmetics is therefore common. However, is tartaric acid dangerous for the skin?

Acide tartrique et vieillissement cutané.
Exfoliating actives
4 min of reading
Skin ageing: Tartaric acid to diminish the appearance of fine lines.

Tartaric acid belongs to the group of alpha-hydroxy acids. Just like lactic acid or glycolic acid, it is a fruit acid. Let's focus on this active ingredient with multiple benefits against the signs of ageing.

FAQ about aha

Which AHA is the most effective?

The choice depends on your skin type and concerns. The glycolic acid is often considered the most effective for exfoliating and improving skin texture, while the lactic acid offers a gentler exfoliation coupled with hydration.

Can AHAs be used in the morning?

AHAs can increase the skin’s sensitivity to sunlight and should therefore preferably be used in the evening. Adequate sun protection is then essential the following day.

Can alpha-hydroxy acids (AHAs) reduce wrinkles?

By stimulating cellular turnover, AHAs improve the skin’s appearance and can help reduce the signs of skin ageing.

Are AHAs suitable for sensitive skin?

Most AHAs are too irritating for sensitive skin. Nevertheless, thanks to its high molecular weight, lactic acid is considered a mild AHA that can be used on sensitive skin.

Can AHAs be used daily?

Depending on their concentration, alpha-hydroxy acids (AHAs) may be used daily if the skin tolerates them well. However, it is recommended to begin with intermittent applications to minimise irritation and assess skin tolerance.

Do AHAs lighten pigment spots?

AHAs can help reduce superficial spots by accelerating the removal of pigmented cells, but results require several weeks of regular use.

At what concentration are AHAs used in cosmetics?

In cosmetics, concentrations typically range from 5% to 10% depending on the active ingredients and the products. Beyond that, they more commonly involve aesthetic treatments performed in beauty salons or dermatology clinics.

What are the most common AHAs?

Glycolic acid, lactic acid, mandelic acid and citric acid are among the most commonly used AHAs.

Are AHAs suitable for dry skin?

That depends on the AHAs. Lactic acid, for example, which also has humectant properties, may be particularly suitable for exfoliating dry skin.

Can AHAs be combined with retinoids?

Combining AHAs and retinoids is generally inadvisable, as this combination can prove too irritating for the skin.

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