BHA

The BHAs are oil-soluble and penetrate more deeply into pores, whereas AHAs are water-soluble and primarily act on the surface to remove dead cells.

The most frequently used BHA is salicylic acid.

Unlike most AHAs, the BHAs are not photosensitising and can be used in the morning.

An improvement in skin texture and a reduction in imperfections are generally observed after 4 to 6 weeks of regular BHA use.

The frequency of use varies depending on the formulation containing BHA. Some are suitable for daily application, while others should only be used once a week.

Yes, their lipophilicity enables them to act at the core of sebum-rich zones, helping to reduce pore occlusion and skin imperfections. They are therefore particularly beneficial for oily skin.

Sensitive skin may react to exfoliating acids, including BHA. The use of low concentrations combined with a gradual introduction is generally recommended, whilst monitoring the skin’s tolerance. If redness or irritation occurs, it is best to discontinue use.

By penetrating the pores, BHA helps to dissolve accumulations of sebum and dead skin cells responsible for open comedones. It thus contributes to reducing the appearance of blackheads.

Yes, but certain combinations, particularly with other exfoliants or retinoids, should be used with caution. The combination of BHA with moisturising or soothing actives is preferable and may even help to improve skin tolerance.