A synthetic peptide with the "tri" (meaning three) designation referring to this peptide's mix of the amino acids proline, serine, and threonine. At this time tripeptide-32, like most other peptides, has theoretical skin-restoring ability and likely serves to bind moisture to skin, but all other fantastic-sounding claims remain in the realm of a petri dish or are simply unproven or unknown.

See peptides

Back to Ingredient Dictionary

About the Experts

Paula Begoun is the best-selling author of 20 books about skincare and makeup. She is known worldwide as The Cosmetics Cop and creator of Paula’s Choice Skincare. Paula’s expertise has led to hundreds of appearances on national and international radio, print, and television including:

The Paula's Choice Research Team is dedicated to busting beauty myths and providing expert advice that solves your skincare frustrations so you can have the best skin of your life!