Peptides in Skincare: The Complete Guide

Peptides are the quiet workhorses of anti-ageing skincare — and the family our formulas are built on. This guide explains what they are, the main types you’ll see, and how to get the most from them.

What are peptides?

Peptides are short chains of amino acids — the building blocks of proteins like collagen and elastin. In skincare they act as messengers: they signal skin cells to behave in a firmer, more youthful way, for example by supporting the skin’s own collagen production. Because they work with the skin’s natural processes, they’re generally gentle and suit most skin types.

The main types of peptide

• Signal peptides — tell skin to support firmness and structure (e.g. the palmitoyl peptides in Matrixyl® 3000).
• Carrier peptides — deliver trace minerals into the skin. Our signature copper peptides are carrier peptides that ferry copper, essential to skin renewal.
• Targeted peptides — developed for specific concerns, such as the under-eye, lips, or facial volume.

What do peptides do for skin?

Used consistently, peptides support the look of firmness, elasticity and density, and help soften the appearance of fine lines. They are cosmetic actives that work gradually rather than overnight. Osmotics has specialised in peptide chemistry — copper peptides in particular — since 1998, and formulates each peptide at the level used in the research behind it.

How to use peptides

Peptides are easy to layer and pair well with almost everything, including retinol, vitamin C and hyaluronic acid. Apply your peptide serum or treatment after cleansing, then moisturise. A peptide cream such as Blue Copper 5 Firming Elasticity Repair can double as your moisturiser step, and targeted peptides like those in Under Eye Rejuvenator and Nécolleté address specific areas.

Browse every peptide we use in the Ingredient Glossary, or find your match with the skin quiz.

Frequently asked questions

What do peptides do for your skin?

They signal skin to support its own firmness and structure, helping the look of elasticity and fine lines improve over time.

Are peptides better than retinol?

They do different jobs and work well together — retinol accelerates renewal, peptides support the skin’s structural machinery. Many routines use both.

Can I use peptides every day?

Yes. Peptides are gentle and designed for continuous morning and night use.

Can I layer peptides with other actives?

Yes — they pair well with retinol, vitamin C, niacinamide and hyaluronic acid.

How long do peptides take to work?

Peptide results build gradually, typically over several weeks to a few months of consistent use. Individual results vary.