Skincare, decoded.

Clear, evidence-first guides to peptides, actives and glow. We read the research and check the claims, so you only buy what works.

Start with Peptides 101 Browse the Best Of edits
Evidence-first Independently chosen Reader-supported

Start here

Peptides 101: what they actually do for your skin

The plain-language guide to signal peptides, carrier peptides and what the research supports. Read this first.

Copper peptides, explained

GHK-Cu is the breakout ingredient of the year. What it does, and how to use it.

The beginner peptide routine

A simple AM/PM routine that layers peptides correctly with retinol and vitamin C.

The edits, coming first

Best copper peptide serums of 2026

In testing now

The best peptide serums under $30

In testing now

Peptide moisturizers for mature skin, ranked

Researching

Know your ingredients

Peptides Copper peptides (GHK-Cu) Matrixyl Argireline Peptides + retinol Peptides + vitamin C

How we decide what's worth buying

Every product we recommend is assessed against four things, in this order. No exceptions, and no shortcuts.

01

The formula

Is the active peptide actually named on the ingredient list, and does it sit high enough up it to matter? An unnamed peptide near the bottom is marketing, not formulation.

02

The evidence

What does published cosmetic research support for that ingredient, at roughly that concentration? We say when the evidence is strong, and when it is thin.

03

The experience

Texture, scent, how it layers under sunscreen, whether the packaging protects the formula. A product you dislike using is one you will not finish.

04

The value

Price per millilitre against comparable formulas. Expensive is sometimes justified. Often it is not, and we say so.

Products are chosen editorially first. Affiliate links are added afterwards, and commission never influences a ranking — where a product we rate has no affiliate programme at all, we still recommend it.

Get the free Peptide Routine Cheat Sheet

One page: which peptides do what, how to layer them with retinol and vitamin C, and a simple AM/PM routine to start this week.

We read the research, so you don't have to buy the hype.

The Glow Formulary is an independent skincare publication. Reader-supported through affiliate links; never sponsored rankings.

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