Pe
Peptides
Palmitoyl Pentapeptide-4 · Acetyl Hexapeptide-8Active
Short chains of amino acids that signal skin cells. Different peptides do different things — collagen support, soothing, or 'botox-like' relaxation.
What it does
Peptides are messenger molecules. Signal peptides (e.g. Matrixyl) prompt collagen production. Carrier peptides (copper peptides) deliver trace minerals. Neurotransmitter-inhibiting peptides (e.g. Argireline) reduce muscle contraction in expression areas. Evidence varies dramatically by peptide; treat the category as 'depends which one.'
The evidence, graded
expert consensusPeptides support collagen production through pathways distinct from retinoids. Combining the two can compound anti-aging benefits without compounding irritation.Mukherjee 2006 · Clinical Interventions in Aging ↗
emergingSome peptides are pH-sensitive and may degrade in acidic environments (low-pH AHA, BHA, or L-ascorbic acid). Apply at separate steps with a wait, or split into different times of day for stability.Errante 2020 · Frontiers in Chemistry ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Also known as
peptides, matrixyl, argireline, copper peptides
Pairs worth knowing
This page is public and indexed on purpose (unlike profiles and drops, which are unlisted) — it’s the citation behind shared ingredient cards, and it should be findable.
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