Peptides are everywhere, from serum labels to supplement bottles to your feed. This guide explains what they actually are, how they work in skincare and supplements, and what the evidence supports, without the hype.
A single reference for every named peptide covered across our guides, organized by function, with a one-line summary and a link to the full breakdown for each.
Peptides and niacinamide are one of the easiest active pairings to combine, without the irritation concerns of retinol or the formulation issues of vitamin C. Here is why, and what each ingredient actually contributes.
Peptides and vitamin C both get marketed for firmer, brighter skin, but they don’t always play well together in the same formula. Here is what actually separates them and how to layer them without wasting either one.
Palmitoyl pentapeptide-4 helped popularize the entire signal peptide category in skincare. Here is what makes it different from copper peptides and acetyl hexapeptide-8, and what the research actually shows.
Acetyl hexapeptide-8 is the ingredient behind some of the best-known “instant” wrinkle serums, often marketed alongside comparisons to injectable treatments. Here is what it actually does, and where that comparison breaks down.
Longevity culture talks about peptides constantly, often blending well-supported skincare research with much bigger, far less settled claims about aging itself. Here is how to tell which is which.
What the Beauty Magazine Covers
Here, we explain the research behind peptides and cover the skincare formulations built on that science.
How We Cover This
We break down what peptides actually are, how they work in skincare and supplements, and what published research and regulatory guidance actually support. Every claim here is limited to what the evidence backs: we describe what an ingredient may support, not what it treats or cures.
Alongside the science, we cover established luxury skincare, including formulations from houses that apply peptide research in practice. Reviews and guides in this category focus on ingredients, formulation, and what a product is actually built to do, not just the name on the box.
Where to Start
New to the topic? Start with our guide to what peptides actually are, then explore the specific categories below: skincare applications, oral supplements, and the research behind the current interest in this ingredient.
For a quick lookup of any other named peptide in this series, the Peptide Glossary has the full list in one place.