Humectant

NaPCA

INCI: sodium PCA

Reviewed by Kate · Last updated 18 Aug 2026

Natural moisturising factor component

Addresses

dehydration, dryness

What Is NaPCA?

NaPCA (Sodium PCA) is the sodium salt of pyrrolidone carboxylic acid, a naturally occurring component of the skin's Natural Moisturising Factor. It is a highly effective humectant that draws moisture from the air into the skin.

As one of the most hydrating ingredients in skincare, NaPCA helps maintain optimal skin hydration levels and supports the skin's natural moisture balance.

Frequently Asked Questions

From the Clinic

Not sure what your skin actually needs?

Two minutes, a few questions, and we’ll point you at what matters — no guesswork.

Take the skin quiz

Part of a family

NaPCA is a variant of Sodium PCA, the form you will most often see on an ingredients list.

Sodium PCA is the sodium salt of PCA (pyrrolidone

Learn More About Skincare Ingredients

Explore our comprehensive ingredient glossary to understand what's in your products.

Browse All Ingredients

Authorised Stockist

Official UK retailer

Tracked Delivery

Free UK shipping over £50

5 Star Rating

Trusted by thousands

Expert Advice

Free consultations