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.
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.
Peptides didn’t become a household word by accident. Several separate trends converged at once, from biotech advances to a completely unrelated medical news cycle. Here is what’s actually behind the surge.
Collagen peptides are commonly marketed for joint comfort, but the research and the marketing don’t always line up. Here is what the evidence supports, and when joint pain needs more than a supplement.
Peptide serums and supplements for hair are a growing category, but the evidence varies widely by product type. Here is what’s actually supported, and when hair thinning calls for a doctor rather than a shampoo.
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 like La Prairie 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.