Peptides are one of the most talked-about ingredients in skincare, and one of the most confusing. Serums, moisturisers, eye creams and even cleansers now list them on the front of the bottle, but the label rarely explains what they are, what they do, or whether the one you are holding is any good.
This guide is the hub for everything we cover on peptides. It explains what peptides are, the main types, what they can realistically do for your skin, how to use them, what to pair them with, and where to read more on each topic.
What Are Peptides?
Peptides are short chains of amino acids, the building blocks of proteins. A protein such as collagen is a very long chain; a peptide is a small fragment, usually somewhere between two and fifty amino acids. Your skin already contains and produces many of them, and some peptides act as messengers that tell skin cells what to do.
In skincare, peptides are made in a lab and added to products. Most are given a long, technical name on the ingredient list, such as palmitoyl tripeptide-1 or acetyl hexapeptide-8. The prefix (palmitoyl, acetyl, myristoyl) usually describes a fatty group attached to the chain to help it sit in the skin better. If you want the short beginner version, start with our peptides 101 guide.
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Get it freeThe Main Types of Peptides in Skincare
Not all peptides do the same job. Skincare chemists generally group them by how they are meant to work:
Signal Peptides
These are designed to act like messages that nudge skin cells to produce more collagen and other structural proteins. They are the most common type in anti-ageing serums and creams. Names to look for include palmitoyl tripeptide-1 and palmitoyl tetrapeptide-7, often sold together in branded blends.
Carrier Peptides
Carrier peptides deliver trace minerals to skin. The best known is copper tripeptide-1 (also written GHK-Cu), which carries copper. Our copper peptides guide covers what it does and who it suits.
Neurotransmitter-Inhibiting Peptides
Sometimes called the “wrinkle-relaxing” peptides, these are designed to reduce the muscle signals that create expression lines. Acetyl hexapeptide-8 is the best known. Their effects on fine lines are modest and nothing like an injectable treatment.
Enzyme-Inhibitor Peptides
These aim to slow the enzymes that break down collagen and other support proteins. They are less common on labels and usually appear as plant-derived peptides in blends.
Each type works a little differently, and we explain the mechanisms in how peptides work.
What Can Peptides Do for Your Skin?
Peptides are a supporting ingredient rather than a miracle one. Based on the research that exists, the realistic benefits are:
- Skin that looks and feels firmer and smoother, mostly seen with consistent use over several weeks.
- A softer look to fine lines, particularly around the eyes and mouth, rather than deep wrinkles.
- Better hydration and comfort, because peptide products are usually formulated alongside humectants and barrier-supporting ingredients.
- A gentle option for people who find retinoids or strong acids too irritating.
It is important to be realistic. Much of the published evidence is small, short and sometimes funded by ingredient manufacturers, and peptides do not have the track record that retinoids and sunscreen have. We go through what is known in do peptides work.
Who Should Use Peptides?
Peptides suit most skin types and ages. They are especially popular with people who:
- want a gentle anti-ageing step that is unlikely to cause peeling or redness
- have sensitive skin that cannot tolerate retinol every night
- already use sunscreen and a simple routine and want to add something supportive
If you are pregnant or breastfeeding, or have a skin condition, check new products with your doctor or dermatologist before adding them.
How to Use Peptides
- Cleanse your face gently.
- Apply peptides to clean, slightly damp skin. A serum goes on first, then a moisturiser over the top. Many peptide moisturisers can be used on their own.
- Use them once or twice a day. Morning, night, or both works. Many people use them both morning and night.
- Be patient. Give a product at least 8 to 12 weeks before judging it.
- Always finish with sunscreen in the morning. Sun protection does more for ageing skin than any peptide. See our SPF guide.
Patch test any new product on a small area for a couple of days first. For a step-by-step plan, see the beginner peptide routine, and for the right order of products, our skincare routine order guide.
What to Pair Peptides With
Good Partners
Peptides usually work well alongside hyaluronic acid, niacinamide, ceramides and sunscreen. These support hydration and the skin barrier, which is a good base for any anti-ageing step.
Ingredients That Need More Thought
- Retinol: they can be used in the same routine, for example peptides in the morning and retinol at night. See peptides vs retinol.
- Vitamin C: many people use vitamin C in the morning and peptides at night, or layer them if the formulas are gentle. Our guide to peptides with vitamin C explains the options.
- Copper peptides with strong actives: these need extra care. Read copper peptides with retinol, vitamin C and tretinoin.
- Strong exfoliating acids: very low-pH products may reduce how stable some peptides are, so many people use them at different times of day.
How to Choose a Peptide Product
The label can be misleading, so check these points:
- Look for named peptides on the ingredient list rather than a vague claim. Ingredients are listed from highest to lowest concentration, so a peptide near the very end may be present in a very small amount.
- Look at the supporting formula. Hydrating and barrier-friendly ingredients matter as much as the peptide.
- Prefer opaque, airtight packaging such as a pump or tube.
- Choose a texture you will use every day. The best product is the one you actually apply consistently.
Our guide to skincare products with peptides covers each product type in more detail. If you are ready to shop, see our best peptide serums and best peptide moisturizers.
Peptide Side Effects and Safety
Peptides are generally well tolerated. Possible reactions include mild redness, itching or breakouts, usually linked to other ingredients in the formula such as fragrance or preservatives rather than the peptide itself. Stop using a product if your skin stings, swells or develops a rash, and speak to a doctor if it does not settle.
What About Collagen Peptides You Swallow?
Collagen powders and drinks are a different thing from peptides in your skincare. Some small trials suggest modest improvements in skin hydration and elasticity, but the evidence has limitations. We look at it carefully in do oral collagen peptides work for skin.
Where Peptides Fit in a Routine
Peptides work best as part of a simple routine built on cleanser, moisturiser and sunscreen. Add them as one extra step rather than replacing the basics. If you are in your thirties and thinking about anti-ageing, our skincare routine for your 30s shows where they fit, and for older skin see the mature skin routine. Using them around the eyes? See our best eye creams.
Peptides in Skincare FAQ
What do peptides do in skincare?
They are short chains of amino acids that, depending on the type, may support skin firmness, hydration and the look of fine lines. They are a supportive step rather than a dramatic one.
How long do peptides take to work?
Studies usually run for 8 to 12 weeks, so give a product at least that long before deciding. Our guide on whether peptides work goes into this.
Can I use peptides every day?
Yes. Most peptide products are gentle enough to use morning and night.
Are peptides better than retinol?
Retinoids have much stronger evidence for fine lines and texture. Peptides are gentler, and many people use both at different times. See peptides vs retinol.
Do I need a peptide serum and a peptide moisturiser?
No. One well-formulated peptide product is enough for most people. Using both is a matter of preference.
Can I use peptides if I have sensitive skin?
Often yes, as they are among the gentler anti-ageing ingredients. Choose fragrance-free formulas and patch test first.
This article is for general information and is not medical advice. Product formulas change from time to time, so always check the current ingredient list before buying.