Rigin

How it works

GQPR on a palmitic tail; its maker says it derives from immunoglobulin G. Sold to calm the low-grade inflammation that ages skin.

What it's made of

4 amino acids (GQPR) with a palmitic acid tail. Its manufacturer, Sederma, says it comes from immunoglobulin G. It goes with palmitoyl tripeptide-1 in Matrixyl 3000.

What it's for

Prescribed for

Nothing: it is a cosmetic.

Sold as

Calms the inflammation that ages the skin and leaves it firmer.