Most people looking into peptides are not actually sure what they need. They just know something about their skin, recovery, or ageing does not feel right.
Peptides and polynucleotides are two of the biggest conversations in regenerative aesthetics right now. So which is better for your skin?
Think of peptides as signals. They tell the body to do things.
Think of polynucleotides as repair support. They help the skin regenerate.
For most clients who want visible skin improvement, polynucleotides are usually the stronger choice.
| Question | Peptides | Polynucleotides |
|---|---|---|
| What are they? | Short amino acid chains that act like signals | DNA fragments that support tissue repair and regeneration |
| Best for | Signalling, inflammation, recovery, wellness | Skin quality, crepey skin, under-eyes, hydration, elasticity |
| Results | Can be subtle and variable | More predictable for visible skin quality |
| Timeline | Gradual, depends on type | Often starts within weeks, builds over 8 to 12 weeks |
| Best starting point? | Sometimes useful as an add-on | Usually the better first choice for skin |
Peptides are short chains of amino acids. In the body, they can act like messengers, telling cells to behave in a certain way.
In skincare and aesthetics, peptides are often discussed for collagen support, inflammation control, skin repair signalling, recovery and longevity interest, and overall skin quality.
Topical peptides are generally more familiar in skincare. Injectable peptides are a newer, more controversial area because quality, sourcing, dosing and regulation can vary significantly.
Polynucleotides are injectable regenerative skin treatments made from purified DNA fragments. They are used in aesthetics to support tissue repair, skin hydration, elasticity, collagen support, skin texture and under-eye quality.
That is the key difference. Peptides = signals. Polynucleotides = repair support.
For most clients who want visible skin improvement, polynucleotides are usually better. Especially if your concerns are under-eye thinning, tired-looking skin, loss of elasticity, dullness, crepey texture, dehydration that skincare is not fixing, early ageing, or poor skin quality after stress, weight loss or sun exposure.
If someone is asking me, "What will actually make my skin look better?", I would usually guide them towards polynucleotides first, not peptides.
Peptides are best for people interested in skin signalling, recovery support, inflammation support, wider wellness and longevity, biohacking-style optimisation, or supporting the body alongside other treatments. For those interested in this approach, my guide on biohacking your face explores how these fit into a wider regenerative strategy.
They are not usually my first choice if someone wants the most visible improvement in facial skin. A peptide may be interesting for someone who is already doing advanced treatments and wants to explore a more layered approach. If you want to know which peptide is right for your skin specifically, my best peptides for skin guide breaks down Glow vs Copper vs BPC-157. You can also read my full guide on peptide injections.
Polynucleotides are best for clients who want healthier-looking skin, improved texture, better hydration from within, under-eye improvement, smoother fine lines, stronger skin quality, and subtle regeneration without looking "done".
This is why I often position polynucleotides alongside treatments like HIFU for lifting, microneedling with exosomes for regeneration, and polynucleotides for repair and skin quality.
For under-eyes, polynucleotides are usually the better choice. Under-eye concerns are often caused by thin skin, dehydration, poor tissue quality, crepey texture and loss of elasticity.
Polynucleotides are commonly used in aesthetics for these exact concerns because they focus on repair and regeneration rather than just surface hydration.
For glow, both can be relevant but they work differently. Peptides may support a glow by improving skin signalling. Polynucleotides support glow by improving the underlying quality of the skin.
If your glow disappears as soon as you stop using products, your skin may need repair rather than just stimulation.
Choose peptides if: you are interested in longevity, wellness, recovery and advanced optimisation.
Choose polynucleotides if: you want visible skin quality improvement, especially if your skin is thinner, duller, crepey or less elastic than it used to be. If your concern is skin laxity or lifting rather than texture, HIFU treatments may be a more appropriate option.
A client comes in asking about peptides because she has seen them everywhere online. She says: "My skin just looks tired. I feel like I have aged suddenly, especially under my eyes."
In that situation, I would not automatically recommend peptides. I would assess skin thickness, hydration, texture, laxity and under-eye quality.
Very often, the better starting point is polynucleotides, because they are designed specifically for skin quality and regeneration. For overall skin regeneration, treatments such as microneedling with exosomes may also be more effective depending on your goals. Peptides may come later, but they are not always the first step.
Most clients who ask about peptides are actually better suited to something else first.
Send me a photo on WhatsApp and I will tell you honestly what to expect before you book.
Usually responds within a few hours
For the face, polynucleotides usually give the more visible result. Peptides may be interesting, but results can be subtle, systemic or dependent on the exact peptide.
Polynucleotides are easier to connect to visible skin goals: smoother skin, brighter-looking skin, firmer texture, better hydration, improved under-eye quality.
1 to 2 weeks before: Neither is a last-minute miracle. You may be better with facial sculpting and lymphatic drainage.
4 to 8 weeks before: Polynucleotides may be a good option for better skin quality.
8 to 12 weeks+: This is the ideal window for regenerative skin planning, where polynucleotides, exosomes, HIFU or a combined plan can be much more strategic.
Not all peptides are licensed in the UK. Quality and sourcing vary significantly between providers. Long-term data is still evolving for many injectable peptides.
Polynucleotides are more established within aesthetic treatment pathways, but they are still injectable treatments requiring proper consultation and technique.
You can also read my comparisons of polynucleotides vs Botox and exosomes vs polynucleotides for more context.
Peptides are exciting. But polynucleotides are more directly relevant for most people who want better-looking skin.
If your goal is skin quality, glow, hydration, elasticity and repair, I would usually start with polynucleotides.
If your goal is wider optimisation, recovery, longevity or a more experimental approach, peptides may be something to explore later.
The key is not choosing the trendiest treatment. The key is choosing the treatment your skin actually needs.
At my Fulham clinic, I see clients from Fulham, Parsons Green, Chelsea, Knightsbridge, Putney, Battersea and wider West London who are curious about regenerative treatments but unsure where to start.
My approach is simple: I would rather guide you honestly than sell you something because it is trending. You can read more about how I approach peptide therapy in Fulham on my dedicated page.
Send me a photo and I will tell you honestly whether peptides are worth exploring, or whether polynucleotides or another treatment would give you a better, more reliable result.
Send me a photo on WhatsAppNo pressure. Just honest guidance.