AHA

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

AHAs can render the skin more photosensitive and should therefore be applied preferably in the evening. Sun protection is then indispensable the next day.

By stimulating cellular renewal, AHAs improve the skin’s appearance and can help diminish the signs of skin aging.

Most AHAs are too irritating for sensitive skin. However, thanks to its high molecular weight, lactic acid is considered a gentle AHA suitable for use on sensitive skin.

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

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

In cosmetic formulations, concentrations typically range from 5% to 10%, depending on the active ingredients and the products. Beyond that threshold, they are usually professional aesthetic treatments performed in beauty spas or dermatology clinics.

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

It depends on the AHAs. Lactic acid, for example, which also has humectant properties, can be beneficial for exfoliating dry skin.