How often should glycolic acid be used?

Also known as hydroxyacetic acid, glycolic acid is the most popular form of alpha-hydroxy acids (A.H.A.). This group of molecules also includes lactic acid, citric acid, mandelic acid, malic acid, and tartaric acid. These are natural derivatives of certain fruits (orange, pear, grape, apple, etc...) or even animals (milk).

Although it can also be synthetically synthesised, glycolic acid is typically of natural origin, derived from sugar cane. It is alsothe smallest molecule of all the A.H.A. Due to this property, it can penetrate the various layers of the epidermis more easily and deeply, depending on its concentration, making it an effective tool for mitigating a variety of skin issues ranging from acne to hyperpigmentation to ageing.At low concentrations (<5%), it has moisturising properties, while at high concentrations (>20%) it is a powerful exfoliant.

Glycolic acid offers numerous benefits: it is primarily known for itsoutstanding keratolytic virtues. This ingredient has the ability to remove dead skin cells accumulated on the surface by stimulating the regeneration of a new stratum corneum. As a result, glycolic acid significantly improves skin texture, by hydrating the skin, combating imperfections (enlarged pores, blackheads, spots, excess sebum), reducing the appearance of wrinkles, acne scars and pigmentation spots (dark spots, age spots, melasma) and adding radiance and vitality. It is possible to find this active ingredient in many formulas such as creams, serums, shower gels, cleansers, masks, shampoos or lotions.

It is advisable to use it during the evening daily beauty routine to minimise any risk of photosensitisation. Indeed, glycolic acid increases the skin's sensitivity to the sun, thus the risk of sunburn. We also recommend consistently applying a SPF cream every morning and limiting or even avoiding prolonged sun exposure, as long as you are using a product containing glycolic acid and up to a week after its last application. In the same vein, prefer the application of glycolic acid-based products in autumn/winter, rather than in the summer period. However, it remains possible to start or continue applying glycolic acid solutions during sunny episodes (spring and summer), provided of course that it is combined with a minimum SPF30 sun protection and avoiding the sun as much as possible.

The frequency of use depends on your skin type, skin tolerance level, as well as your needs and expectations. We advise you to start at spaced intervals, such as every other night or even every third night, then increase the frequency after one to two weeks if your skin tolerates this active ingredient well. It is normal to temporarily feel a slight sensation of warmth, some tingling or a slight dryness of the skin during the initial days. If your skin is naturally dry or if you are applying a glycolic acid treatment for the first time, start with a treatment with a low concentration of glycolic acid so that your skin can acclimatise (around 5%).

Our exfoliating toner lotioncontaining 8% glycolic acid and ourexfoliating face serumwith 10% glycolic acid can be used daily. However, stronger chemical peels (between 10 and 20%) should be applied only 1 to 2 times per week and should not exceed the indicated application time. Before applying a product to your face, make sure to follow the manufacturer's instructions carefully.