The 4-night protocol for more radiant skin

The 4-night protocol for more radiant skin

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Zinc PCA

Commonly known as: 5-oxo-proline, Zinc salt.
I.N.C.I. list name: Zinc PCA.
Extraction process: Reaction of pyrrolidone-carboxylic acid (PCA), obtained by thermal cyclization of glutamic acid from beet molasses (dehydration reaction), with zinc oxide (ZnO), stirring, filtration, atomization.
Source: Végétale (L-PCA) et minérale (oxyde de zinc).
Botanical name: Beta vulgaris L. (betterave).
Family: Chénopodiacées.
Part of the plant extracted: Fruits.
Provenance, origin: France.
Chemical characteristics: Sel de zinc de l'acide pyrrolidone-carboxylique, Soluble dans l'eau, les solutions hydroalcooliques et le propylèneglycol ; Insoluble dans les huiles ; Masse moléculaire : 321,6 g/mol ; pH recommandé : 4,0 - 6,0.
Characteristics: Emulsion, solution colloïdale, solution vraie aqueuse, aérosol, solution hydroalcoolique.
Dosage required in cosmetic products: Pour qu'il soit efficace, il doit être au minimum à 0,1% dans un cosmétique.
Function: Humectant, agent d'entretien de la peau.
Properties: Séborégulatrice, anti-inflammatoire, matifiante, anti-bactérienne, hydratante, apaisante, rééquilibrante, purifiante.
Benefits: Tous les types de peaux surtout les peaux mixtes à grasses, les peaux à tendance acnéique, les peaux irritées et les peaux matures ; Tous les types de cheveux en particulier les cuirs chevelus avec des pellicules, les cuirs chevelus à tendance grasse.



  • Face care (micellar waters, anti-imperfection creams and serums, purifying exfoliating cleansing gels, purifying masks, purifying lotions, purifying botanical mists, cleansing bar);

  • Body care (deodorants, purifying body serums, cleansing gels);

  • Hair care (balancing shampoos, purifying dry shampoos, purifying hair serums, purifying masks, balancing scalp lotions);

  • Hygiene (deodorants);

  • Make-up (mattifying foundations, correctors).


Zinc PCA is not particularly sensitive to sunlight or temperature variations. Nevertheless, to ensure the effectiveness of the product in which it is formulated, we advise you to keep it away from light, air, humidity, and heat.

Contra-Indications and Precautions

Zinc PCA does not present any contraindications or health risks. Nevertheless, stop the use of a zinc PCA skincare if you feel discomfort.

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A trace element naturally present in the body, zinc is essential for its proper functioning. It is involved in many mechanisms, for example in the regulation of the immune response. Thus, a zinc deficiency would be linked to an exacerbation of inflammatory phenomena. For example, if the skin lacks zinc, redness due to imperfections is more intense. Zinc also significantly reduces the production of sebum and is often used in creams for acne treatments. Finally, it is known to limit the development of microorganisms that cause many skin imbalances. The L-PCA part improves the absorption of zinc by the skin (increase of its bioavailability) and supports its hydration.