Polynucleotides have become one of the most sought-after regenerative treatments in London, and the reason is simple: they improve the health and quality of your skin rather than simply changing how it looks on the surface. If you are curious about what this treatment can actually do for you, this guide walks through the real benefits of polynucleotides, how quickly you can expect to see them, and how long they last.
What are polynucleotides, briefly?
Polynucleotides are injectable biostimulators made from purified fragments of salmon DNA. Rather than adding volume like a filler or relaxing movement like anti-wrinkle injections, they work at a cellular level, acting as a biological signal that prompts your skin to repair and regenerate itself. That regenerative action is where all of the benefits come from, so it helps to keep it in mind as we go through them. If you would like the full science, our complete guide to what polynucleotides are covers it in more depth.
The key benefits of polynucleotides
Smoother, more refined skin texture
One of the first things people notice is an improvement in skin quality. As polynucleotides stimulate cellular renewal, the skin’s surface becomes smoother and its tone more even. This is why the treatment suits skin that looks dull, rough or tired, even when volume is not the concern.
Firmer, more elastic skin through collagen stimulation
Polynucleotides encourage your fibroblasts, the cells that produce collagen and elastin, to become more active. Over the weeks that follow your course, this supports stronger elasticity and a firmer, more resilient feel. Because the change is gradual and built from your own collagen, the result looks natural rather than tightened or altered.
Softer fine lines and early signs of ageing
By improving hydration and rebuilding the skin’s support structure, polynucleotides help to soften the appearance of fine lines and early wrinkles. This is a refinement rather than a freezing of movement, so your expressions stay entirely your own.
Deep, lasting hydration, especially under the eyes
Polynucleotides improve the skin’s ability to hold moisture from within, and this is one of their most valued benefits around the delicate under-eye area. Here, where thicker treatments are not always suitable, they can improve hydration and skin quality gently, helping tired-looking eyes appear fresher and brighter. We cover this in detail in our guide to polynucleotides for dark circles and eye hollows.
A calmer, more even complexion
Polynucleotides also have a soothing effect, helping to reduce inflammation and calm redness. For many people this means a more even, settled-looking complexion over the course of treatment.
Natural-looking results with minimal downtime
Perhaps the greatest benefit is how understated the results are. Because the treatment works with your own biology, your skin simply looks healthier and better rested, without any obvious sign of having had something done. It is also minimally invasive, so most people return to daily life straight away.
How quickly will you see the benefits?
Polynucleotides work gradually, and the results build in stages. As a general guide:
- At two to three weeks, most people notice the first signs of improved glow, hydration and texture
- At eight to twelve weeks, improvements in fine lines, firmness and elasticity become more visible
- The full benefits are typically sustained across the following months
A course of three sessions, spaced two to four weeks apart, is recommended to achieve these results, with each session usually taking around 30 to 45 minutes. This staged approach gives your skin time to respond and rebuild between visits.
How long do the benefits last?
Following a full course, results generally last between six and nine months, while the under-eye area tends to hold results for around five to seven months. To maintain the benefits, top-up sessions every six to nine months are recommended. This is why polynucleotides are best viewed as part of a longer-term approach to skin health rather than a one-off treatment.
Supporting your results with good aftercare
Aftercare is simple but worthwhile, and it helps you get the most from the treatment. Your practitioner will give you tailored advice, but in general it helps to wear a daily SPF 50, avoid strenuous exercise for the first 24 hours, support your skin with antioxidant skincare such as vitamin C and retinol, and hold off on harsh procedures in the days immediately afterwards. Any small bumps or mild swelling at the injection points usually settle within 24 to 48 hours.
Who benefits most from polynucleotides?
Polynucleotides suit a wide range of people, from those in their late twenties wanting to protect and maintain healthy skin, to those looking to improve firmness, hydration and texture later in life. They are a particularly reassuring option if you are new to aesthetics and want a subtle, natural result. The treatment may not be suitable if you have a fish allergy, are pregnant or breastfeeding, or have certain autoimmune conditions, which is exactly what your consultation is there to check.
Ready to explore polynucleotides in London?
The benefits of polynucleotides build gently over time, rewarding a little patience with healthier, more resilient and naturally refreshed skin. If you would like to find out whether polynucleotide treatment in London is right for you, our practitioners at PHI Clinic will be glad to talk you through your options. Book a consultation to discuss your skin, your concerns and a plan tailored to you.
Frequently asked questions about the benefits of polynucleotides
What is the main benefit of polynucleotides?
Their main benefit is improving the overall quality and health of your skin. By prompting natural regeneration, they enhance texture, firmness, hydration and tone, giving a fresher, healthier and more rested appearance without adding volume.
Are the results of polynucleotides natural-looking?
Yes. Because the treatment stimulates your own collagen and skin renewal rather than adding filler, the results look natural. Your skin simply looks healthier, and your expressions are unaffected.
How soon will I notice a difference?
Most people see the first signs of improved glow, hydration and texture within two to three weeks, with fuller improvements in fine lines and firmness developing over eight to twelve weeks.
How long do the benefits of polynucleotides last?
Results typically last six to nine months after a full course, and around five to seven months in the under-eye area. Maintenance sessions help to sustain the benefits over time.
Can polynucleotides be combined with other treatments?
Yes. Many people combine polynucleotides with treatments such as Profhilo or other skin boosters within a longer-term plan. Your practitioner can advise on the right combination for your skin at your consultation.
Is there any downtime?
Downtime is minimal. You can usually return to your day straight away, though small bumps or mild swelling at the injection points may appear and typically settle within a day or two.



