Peptides are one of the most common actives in modern serums, but the label rarely explains what they actually do once they touch skin. Here is the real function, ingredient by ingredient category.
Peptides sit in three very different regulatory categories: cosmetics, supplements, and medicine. Here is what that split actually means for safety, and how to tell which category a product falls into.
Peptides are often described as “sending signals” to cells, but what does that actually mean? Here is what happens between applying a serum or taking a supplement and any visible result.
These three words get used as if they mean the same thing. They don’t. Here is the actual relationship between amino acids, peptides, and proteins, and why the size difference matters for how each one works.
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.
Oud is the most expensive natural ingredient in perfumery. This guide covers what agarwood is, how it forms, why it costs more than gold, and how to wear it.
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.