In which skincare products can we find PHAs?

The P.H.A.s (Polyhydroxy Acids) are part of the hydroxy acid family along with A.H.A.s (Alpha Hydroxy Acids) and B.H.A.s (Beta Hydroxy Acids). Considered as the new generation of A.H.A.s, they are renowned for their keratolytic effects, meaning they eliminate dead cells (a process known as desquamation), which boosts cell renewal and restores radiance to the skin. Moreover, this desquamation allows for deep pore cleansing, thus limiting the appearance of imperfections.

They also possess moisturising properties and humectants. This is due to the numerous hydroxyl functions they contain (OH-) at the level of their chemical structures. These capture water molecules and prevent transepidermal dehydration, thus strengthening the skin barrier.

Unlike A.H.A. and B.H.A., P.H.A. are suitable for all skin types, even those that are sensitive. Indeed, due to their high molecular weights, they remain on the surface of the epidermis. This explains their good skin tolerance compared to other acids which penetrate more deeply into the epidermis.

Poly-hydroxy acids are used in numerous skincare products. They are typically found in toning lotions, serums, face masks, cleansing gels or exfoliants for the skin and scalp. Thanks to their ability to gently exfoliate, they are highly valued, particularly for sensitive skin.

Typology has developed three treatments based on P.H.A., here is the list:

• The exfoliating cleansing gel based on P.H.A. (gluconolactone) offers a gentle chemical micro-exfoliation. It unclogs pores and promotes skin hydration. It also contains aloe vera which hydrates and soothes the skin, as well as inulin which rebalances the skin microbiota. The sweet orange essential oil it contains has antibacterial properties ideal for combating spots.

• The peeling mask is composed of an exfoliating complex based on four A.H.A.s and one P.H.A., which helps to unclog pores and exfoliate the skin. This gel is used once or twice a week and ultimately helps to reduce the presence of blackheads.

• The anti-mark serum improves the appearance of superficial, closed, and shallow scars through the resurfacing and depigmenting action of P.H.A. combined with the regenerative action of Centella asiatica. It also contains liquorice extract which reduces the production of melanin and thus fights against the hyperpigmentation of post-acne marks. Simply apply a drop to the affected areas, only in the evening.

• Thescalp exfoliant provides a dual exfoliation of the scalp: chemical with P.H.A.s, and mechanical with jojoba beads and silica powder. The scalp is healthy, rebalanced and rid of dead cells. The mechanical exfoliation action combined with peppermint essential oil helps to accelerate hair growth by stimulating microcirculation. Moreover, the eucalyptus globulus essential oil it contains calms scalp irritations and limits the appearance of dandruff. Finally, the P.H.A.s and aloe vera stimulate the scalp's natural hydration. This scrub is to be used once or twice a week on a dry scalp. Despite the presence of essential oils, this product can be used by pregnant and breastfeeding women.