Reviews
Independently tested peptide serum roundups and head-to-head comparisons, scored on formula, concentration and value.
31 articles
Peptides and Niacinamide Together: One of Skincare’s Easiest Pairings
Can you use peptides and niacinamide together? Yes, here's the layering order, why they're compatible, and the one copper peptide caveat.
Matrixyl vs Argireline: Two Peptides, Two Jobs
Matrixyl vs Argireline: how each peptide works, what it targets, and when to pick one for firmer-looking skin or softer expression lines.
The Best Peptide Eye Creams for Fine Lines and Puffiness, Compared by a Cosmetic Chemist
A cosmetic chemist's guide to the best peptide eye cream for fine lines and puffiness: five picks compared by what their ingredient lists show.
Peptides vs Hyaluronic Acid: Signalling, Hydration, and How to Use Both
Peptides vs hyaluronic acid: signalling versus hydration, whether to use both, and the layering order that gets the most from each in a serum.
Copper Peptides vs Matrixyl for Firmness: Which Peptide Earns Its Place in Your Routine?
Copper peptides vs Matrixyl for firmness: how GHK-Cu and Matrixyl differ in mechanism, evidence and tolerability, and how to layer them safely.
How Long Do Peptide Serums Take to Work?
How long do peptide serums take to work? Expect gradual, appearance-level results over 8 to 12 weeks. Here's what to watch for and when to quit.
Matrixyl 3000, Explained: The Signal Peptide Duo
Matrixyl 3000 explained: what palmitoyl tripeptide-1 and tetrapeptide-7 are, how signal peptides work, and the appearance benefits studied.
Peptide Serum: Morning or Night? The Honest Answer
Peptide serum morning or night? Both work. How to time peptides around sunscreen, retinol and vitamin C, and why consistency beats the clock.
The Best Peptide Serums for Beginners: How to Choose Your First One
New to peptides? Our guide to the best peptide serums for beginners: gentle ingredient families, how to start slowly, and what to expect.
Do Peptide Serums Actually Work? An Honest, Evidence-First Answer
Do peptide serums actually work? An evidence-first look at signal, carrier and enzyme-inhibiting peptides, what studies show, and realistic
Argireline Before and After: Setting Realistic Expectations for Acetyl Hexapeptide-8
Argireline before and after: realistic expectations for acetyl hexapeptide-8, what appearance change to expect, and over what timeframe.
GHK-Cu for Hair: What the Research Actually Shows (and Doesn’t)
GHK-Cu for hair: what the research says. An honest, cosmetic-science look at copper peptides in scalp and hair products, and where evidence is thin.