Reviews
Independently tested peptide serum roundups and head-to-head comparisons, scored on formula, concentration and value.
31 articles
GuideKupferpeptide: A Clear Look at Copper Peptides in Skincare
Kupferpeptide explained: what copper peptides like GHK-Cu are, what the cosmetic science shows, and how they are used in topical serums.
GuideCopper Tripeptide-1: What This Research Peptide Really Is
Copper tripeptide-1 (GHK-Cu) explained: what this research peptide is, how it works in skincare, and what the cosmetic science actually shows.
The Best GHK-Cu Brand: A Buyer's Guide to Choosing a Copper Peptide Company
Best GHK-Cu brand guide: how to judge concentration disclosure, formulation focus, third-party testing and packaging before you buy copper peptides.
Argireline and Retinol Together: How to Layer Them in One Routine
Can you use argireline and retinol together? How to layer them, AM/PM sequencing, tolerability, and what the cosmetic evidence supports.
Copper Peptides and Retinol Together: What Actually Matters
Can you use copper peptides and retinol together? What the chemistry says, when spacing matters, and how to build a simple AM/PM routine.
GHK-Cu Side Effects: Tolerability, Copper Sensitivity & Patch-Testing
GHK-Cu side effects explained: common reactions, copper sensitivity, purging myths, and how to patch-test copper peptides on skin.
What Argireline Really Does for Expression Lines
What does Argireline do? Acetyl hexapeptide-8, the SNAP-25 mechanism, realistic results, and why the 'topical Botox' label is marketing.
Copper Peptides and Vitamin C: Do They Really Cancel Each Other Out?
Can you use copper peptides and vitamin C together? What the cosmetic science actually says about the 'do they cancel out' myth, plus how to layer them safely.
Do Peptide Serums Expire? Shelf Life, Degradation Signs & Storage
Do peptide serums expire? Learn peptide serum shelf life, PAO symbols, signs of degradation, and storage tips to keep your serum stable.
Signal Peptides vs Carrier Peptides: The Cosmetic Peptide Classes, Explained
Signal peptides vs carrier peptides, explained: how the main cosmetic peptide classes work, with Matrixyl, Argireline and copper peptide examples.
The Best Peptide Moisturizers for Barrier Support and Fine Lines
Looking for the best peptide moisturizer? 5 editor-tested creams for barrier support and fine lines, with INCI highlights, pros and cons.
The Peptide Skincare Routine, Step by Step: AM and PM Layering That Actually Makes Sense
Build a peptide skincare routine step by step: AM and PM order, layering with vitamin C, moisturiser and SPF, and how long results really take.