Sodium PCA sits in our formulas for one job: holding water in the skin. We file it under Hydration in this glossary because that is the effect its evidence actually supports, not because it is the most flattering label available.

Moisture in the surface

The mechanism is the one stated in the summary above, and we have deliberately not extended it. Where a supplier or a competitor would reach for a bigger promise, the sentence we publish stops where the research stops.

Moisture in the evidence

Our source is a peer reviewed observational or laboratory study, recorded as Feng 2014 PMID 24517532. You can read it yourself at PubMed 24517532. We grade that as solid support for what the ingredient does.

Moisture and its limits

The research behind Sodium PCA studies the ingredient, not the finished Opuliss product it sits in. It supports what Sodium PCA does. It is not a trial of our formula, and we will not present it as one.

Cosmetic claims describe how skin looks and feels. Nothing here is a medical claim, and nothing here treats a condition.