Beauty Encyclopedia›Sodium PCA

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Sodium PCA

Also known as: NaPCA, Pyrrolidone Carboxylic Acid

Generally SafehumectantEWG: 1

A component of the skin's own natural moisturising factor (NMF) that binds water to the skin surface.

How it works

Sodium PCA is a natural component of the skin's NMF — the collection of molecules in the stratum corneum that maintain hydration. Because it is naturally produced by the skin, it has excellent compatibility and rarely causes irritation. It draws moisture from the environment and helps maintain softness and elasticity.

Best for

All skin typesDry skinSensitive skin

Commonly found in

TonersSerumsLightweight moisturizers

✅ Pairs well with

GlycerinHyaluronic AcidCeramide NP

Safety & restrictions

No known safety concerns. Naturally occurring skin component.

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For informational purposes only. Not medical advice. Consult a dermatologist for personalised guidance.