Potassium PCA
A humectant from the skin's natural moisturizing factor. It draws in moisture and supports suppleness. Well tolerated.
Evidence by route
Topical application
A hydrating PCA salt. Safe.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Potassium PCA is the potassium salt of pyrrolidone carboxylic acid (PCA), a molecule found in the skin's natural moisturizing factor. In a formula it works as a humectant: it captures water and fixes it in the stratum corneum, which keeps the skin supple and looking well. It is used in serums, creams and formulas for dehydrated skin. Its basis as a humectant is solid, because PCA is a component the skin makes on its own to hold water. The surface-hydration effect is real, though it is best seen as a supporting active rather than a treatment that rebuilds the skin. With topical use it has no systemic relevance, so you can use it during pregnancy and breastfeeding. Tolerance is very good: irritation and allergy are both low, and it suits sensitive skin. It does not dry the skin or add comedogenic load, so it fits any skin type without trouble.
Frequently asked questions
Is Potassium PCA safe during pregnancy?
Potassium PCA is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Potassium PCA for?
Potassium PCA suits: normal, dry, combination, oily, sensitive.
What is Potassium PCA and what does it do in cosmetics?
A humectant from the skin's natural moisturizing factor.
What's the INCI name for Potassium PCA?
The INCI name is Potassium PCA.
See Potassium PCA in a product composition right on the store page
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