
Peter Thomas Roth
Firm X Collagen Serum
46%
Medium match
Low irritancy
3/5
key actives shared
52%
of the original's ingredients
Why it's a dupe
- Both are serums.
- Both contain:HydroxyprolineDimethiconeGlycerin
- Both work for:Anti-agingMoisturizing
- The original also hasAspartic acidPolymethylsilsesquioxane
- Unlike the original, it hasPalmitoyl dipeptide-5 diaminobutyroyl hydroxythreoninePalmitoyl tripeptide-5Acetyl tetrapeptide-2



















