Signal Peptide sits in our formulas for one job: supporting a firmer, smoother look. We file it under Firmness in this glossary because that is the effect its evidence actually supports, not because it is the most flattering label available.

Firmness in the peptide

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.

Firmness in the evidence

Our source is a peer reviewed observational or laboratory study, recorded as Sklirou 2015 PMID 25974626. You can read it yourself at PubMed 25974626. We grade that as solid support for what the ingredient does.

Firmness and its limits

The research behind Signal Peptide studies the ingredient, not the finished Opuliss product it sits in. It supports what Signal Peptide 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.