PDRN Before and After: Realistic Results, Timelines and Photos

Short answer: Realistic PDRN before-and-after results are subtle. In clinical studies of polynucleotide (PN/PDRN) injections, measurable improvements in fine lines and skin texture usually appeared 8 to 12 weeks after a course of two to four sessions, and some gains had faded by six months. Topical PDRN has much less evidence: one 28-day trial of a specific eye cream reported smaller wrinkle measurements, but most of the early "glow" from a serum is hydration. PDRN does not add volume like a filler, so dramatic overnight photos should be treated with caution.

People searching for "PDRN before and after" usually want to know one thing: what will my skin actually look like, and when? This guide answers that using what clinical studies measured, not marketing photos. It covers injectable PDRN and polynucleotides (often called "salmon DNA" or skin boosters, such as Rejuran), PDRN serums and creams, a realistic week-by-week timeline, how to judge before-and-after photos, and how to document your own results fairly. If you are new to the ingredient, start with our complete PDRN guide.

Key takeaways

• A systematic review of nine studies (219 people) found polynucleotide injections improved wrinkles, texture and elasticity, but the studies were small and of low to moderate quality[1].
• Most injection studies used two to four sessions, usually two to three weeks apart, and assessed results between 8 weeks and 6 months[1].
• In a placebo-controlled acne scar trial, only the polynucleotide group improved; the saline group did not[4]. Uncontrolled before-and-after photos cannot show this difference.
• Some improvements declined by six months, although they stayed better than baseline[1,3].
• The strongest topical study tested one 0.1% PDRN eye cream for 28 days in 31 women. It reported larger wrinkle reductions than retinol, but the authors note early changes may partly reflect hydration[6].
• In the UK, advertisers must hold signed, dated proof that before-and-after photos are genuine, and evidence for the level of results those photos imply[8].

Three different "PDRN before and afters"

"PDRN" is used for three very different things, and the photos you see online rarely say which one is shown. Before you compare results, check what was actually done. Our Rejuran vs PDRN guide explains the difference between polynucleotides (PN) and PDRN in more detail.

Practical tip: If a before-and-after photo does not say whether it shows injections, a serum or a combination with microneedling or lasers, you cannot tell what produced the change. Ask, or treat it as an advert rather than evidence.

PDRN injection before and after: what the studies measured

The best summary of injectable results is a 2024 systematic review in the Journal of Cosmetic Dermatology[1]. It included nine studies with 219 people, mostly women in Korea and Italy, treated for crow's feet, fine lines, acne scars, nasolabial folds and pigmentation. The authors rated the studies as low to moderate quality and noted that injection techniques, doses and measurements varied widely[1].

Typical treatment schedules

What changed, in numbers

These figures come from 3D skin-imaging scores, where a lower number means fewer or shallower wrinkles or smoother texture. They are useful for showing direction and timing, but the units are instrument scores, not something you can see in a mirror one-for-one.

• Crow's feet: in a study of 30 people, the wrinkle score fell from 19.39 at baseline to 16.02 at 8 weeks (about 17% lower) and was 17.21 at 18 weeks (about 11% lower than baseline)[1]. The improvement was statistically significant but partly faded between weeks 10 and 18.
• Acne scars: in a double-blind trial, 10 women received polynucleotides and 10 received saline[4]. In the polynucleotide group the scar score fell from 33.14 to 29.24 at 3 months (about 12% lower)[1]. Only the polynucleotide group improved significantly compared with baseline[4].
• Nasolabial folds: the texture score fell from 29.1 at baseline to 16.1 at 3 months (about 45% lower), then rose to 18.9 at 6 months, which was still about 35% better than baseline[1]. Wrinkle scores followed a similar pattern[1].
• Under the eyes, polynucleotides vs hyaluronic acid: in a split-face trial of 27 people, overall aesthetic scores were similar on both sides. Gains in elasticity and hydration decreased over time on both sides, with the polynucleotide side keeping a higher improvement rate[3].

A separate 2026 systematic review of seven randomised trials (183 participants) reached a similar conclusion: polynucleotide and PDRN treatments improved wrinkle outcomes and satisfaction, but samples were small and protocols varied[2]. The most consistent benefit was in wound healing rather than cosmetic results[2]. For the full research picture, see our PDRN clinical evidence review.

Under-eye before and after

Dark circles are one of the most photographed PDRN results. A 2026 real-world study treated 61 adults aged 20 to 67 with three polynucleotide injections, two to three weeks apart[5]. Digital analysis of standardised photos taken one and three months after the last injection showed a significant shift towards less severe under-eye pigmentation[5]. The study was open-label with no control group, so some of the change may not be due to the injections themselves.

A 2026 review comparing hyaluronic acid fillers with polynucleotides under the eyes concluded that fillers remain better for structural correction, such as filling a hollow tear trough, while polynucleotides mainly improve skin quality: elasticity, hydration and fine lines[7]. Read more in PDRN for dark circles and is PDRN a filler?.

PDRN serum before and after: what topical products can show

Topical PDRN is a much harder case. DNA fragments are large molecules, and whether they pass through intact skin depends on fragment size and formulation; our guide on whether topical PDRN works covers this in detail.

The strongest human data so far comes from a 2026 study published in PLoS One[6]:

• Who: 31 healthy Chinese women aged 35 to 55 with self-reported sensitive skin.
• What: a 0.1% medium-length PDRN eye cream on one side of the face and an identical cream with 0.1% retinol on the other, applied twice daily for 4 weeks, with daytime sunscreen required.
• How it was measured: VISIA imaging for wrinkles, Antera 3D for eye bags, a Cutometer for firmness and elasticity, and high-frequency ultrasound for dermal thickness and density, at baseline, day 14 and day 28.
• What changed: by day 28, crow's feet wrinkle area and number fell by about 20–23% on the PDRN side, compared with about 6–7% on the retinol side. Improvements on the PDRN side were visible by day 14.
• The limits: one proprietary formula, 28 days, one population, and several authors work for companies linked to the ingredient. The authors themselves note that early ultrasound changes may partly reflect hydration or plumping rather than lasting structural change[6].

That trial does not tell you what a different PDRN serum will do. Few PDRN products sold in the UK state their PDRN fragment size or concentration, so you usually cannot compare them with the trial formula. What you are most likely to see from a PDRN serum in the first days is the effect of its humectants, such as hyaluronic acid, glycerin and panthenol: plumper-looking, more hydrated skin, which fades if you stop.

To compare formulas rather than marketing, use our UK PDRN Formulation Index, and see our best PDRN serums in the UK and PDRN cream and toner guide.

A realistic PDRN results timeline

This timeline is a summary of when studies measured changes. It is not a guarantee: results vary with age, skin type, sun exposure, product, dose and practitioner technique.

What PDRN cannot do in a before-and-after

Many widely shared PDRN photos show changes that the evidence does not support. Be cautious of before-and-after images that claim PDRN alone did any of the following:

• Restored lost volume in hollow cheeks or tear troughs: that is what fillers do, and a review comparing them found fillers better for structural correction[7].
• Lifted sagging skin or a jawline: injection studies measured skin quality, not lifting.
• Removed deep acne scars in one session: the acne scar trial used two sessions and measured a modest improvement at 3 months[1,4]. See PDRN for acne scars.
• Faded pigmentation or melasma quickly: pigmentation evidence is very limited, and daily sunscreen remains essential[10].
• Reversed ageing in days from a serum: no human study supports this.

If you want a comparison with treatments that have a longer evidence record, see PDRN vs retinol and other actives, PDRN vs PRP and PDRN vs exosomes.

How to judge PDRN before-and-after photos

Small changes in set-up can create a large apparent "result". The studies in the 2024 review stressed that consistent positioning and lighting are needed for photos to be reproducible[1]. Before you trust a photo, check:

1. Lighting and angle. Is the light from the same direction and of the same brightness? Overhead light deepens lines; soft front light hides them.
2. Expression and head position. A slightly raised chin or relaxed face reduces lines and shadows under the eyes.
3. Make-up, skincare and filters. Freshly moisturised or made-up skin looks smoother. Look for a statement that no filter or retouching was used.
4. Timing. A photo taken a day after injections may show swelling, which can temporarily smooth lines. Ask when each photo was taken.
5. What else was done. Many clinic photos combine PDRN with lasers, microneedling, fillers or anti-wrinkle injections.
6. Whether it is typical. A single best-case photo says nothing about how most people respond. Clinical trials report averages for a reason.

UK advertising rules support this checklist. The Committee of Advertising Practice guidance on cosmetic interventions says marketers must hold documentary evidence that before-and-after photographs are genuine, with signed and dated proof from the person shown, and must also hold evidence for the level of results the photos imply[8]. It also says a disclaimer does not excuse retouching in the treated area[8].

How to take your own PDRN before-and-after photos

If you are starting a PDRN serum or a course of skin boosters, your own photos are the most honest way to judge whether it is worth continuing. Use the same method each time:

• Baseline: take photos before your first application or session, on bare skin, at least 30 minutes after cleansing.
• Same place, same light: stand facing a window in daylight, at the same time of day, with no overhead light.
• Same framing: use a fixed distance (mark the floor), keep your phone at eye level, and take front and both side views with a neutral expression and relaxed face.
• No edits: turn off beauty modes, portrait effects and filters.
• Schedule: photograph at baseline, then at 2, 4, 8 and 12 weeks. After injections, wait at least a week so swelling has settled.
• Keep a log: record products, sessions, sunscreen use and anything else you changed. Change one thing at a time so you know what made the difference.

Practical tip: Compare your week 12 photos with your baseline side by side, not with yesterday's. Day-to-day differences in sleep, hydration and light are often bigger than the effect of any single product.

Not sure PDRN is the right next step? Take our free 90-second PDRN check first.

Before you book PDRN injections

Your result depends heavily on who treats you. The NHS advises asking how many of the procedure the practitioner has done, what qualifications and training they have, and whether they belong to a relevant professional association[9]. It also advises not paying until you have had a consultation, and checking whether the practitioner is on a register accredited by the Professional Standards Authority, such as the Joint Council for Cosmetic Practitioners (JCCP) or Save Face[9].

Questions worth asking about before-and-after results specifically:

• Can I see photos of your own patients, taken with consistent lighting, at a stated time after treatment?
• Which product will you use, and can I see the box and the manufacturer's leaflet?
• How many sessions do you recommend, how far apart, and when should I expect to judge the result?
• What will you do if I have a reaction?

Read are PDRN injections safe? for side effects and current UK rules, and PDRN and polynucleotides in the UK for how these products are regulated. Our UK clinic directory lists clinics with published sources; inclusion is not an endorsement. If you have a suspected side effect from a product or medical device, you can report it to the MHRA Yellow Card scheme[11].

Who should take care

Speak to a GP or pharmacist before trying PDRN injections or products if you:

• are pregnant or breastfeeding: there are no safety studies in pregnancy (see is PDRN safe in pregnancy?);
• have a fish allergy, as many PDRN and PN products are derived from salmon or trout;
• have an active skin infection, cold sore or inflamed skin in the area to be treated;
• are using prescription skin treatments, such as tretinoin (see can you use PDRN with tretinoin?).

For general safety of PDRN skincare, read is PDRN safe?.

How to keep your PDRN results

• Wear sunscreen every day. UV exposure is linked to premature skin ageing, and the NHS recommends sunscreen with at least SPF 30 and at least 4-star UVA protection[10]. The topical PDRN trial required daily sunscreen throughout[6]. See our best Korean sunscreens in the UK.
• Expect some fading. Several studies found that gains declined by six months[1,3]. Discuss whether, and how often, maintenance sessions make sense with your practitioner rather than assuming a fixed schedule.
• Keep the rest of your routine simple. A gentle cleanser, moisturiser and sunscreen support the result more than layering several actives. See should you use PDRN morning or night?.

Frequently asked questions

How long does PDRN take to show results?

For injections, most studies reported measurable improvement in fine lines and texture 8 to 12 weeks after a course of two to four sessions[1]. For a PDRN serum, any hydration effect is immediate, while the one eye cream trial reported measurable wrinkle changes by day 14 and day 28[6]. Most serums have no published results timeline.

How many PDRN sessions do you need to see a difference?

Studies most often used two to four sessions, two to three weeks apart[1]. The right number depends on the product, area and your skin, so ask your practitioner how they will judge whether more sessions are worthwhile.

Can you see results after one PDRN session?

You may notice swelling or a temporary "glow" in the first days, but studies assessed results after a full course of sessions[1]. Judging the result after one session, or in the first week, is likely to mislead you.

How long do PDRN results last?

Evidence is limited. In several studies, improvements declined by six months but stayed better than before treatment[1,3]. Long-term studies beyond six months are lacking.

Do PDRN serums give before-and-after results like injections?

Not in the same way. Injections place the product directly in the skin, while serums must pass through it. One 28-day trial of a specific PDRN eye cream reported measurable wrinkle improvements[6], but that does not apply to every serum. Most visible early changes from serums come from hydration.

Why does my skin look worse straight after PDRN injections?

Small bumps, redness, swelling and bruising at the injection points are common in the first days and usually settle within about a week[1]. Take your "after" photos once this has settled. Seek advice if swelling worsens, you develop a fever, or the area becomes hot and painful.

Are PDRN before-and-after photos on social media real?

Some are, but you usually cannot verify the lighting, timing, editing or other treatments involved. UK advertisers must be able to prove their before-and-after photos are genuine and that the results they imply are typical[8]. If the claims seem dramatic, ask for the evidence.

Is PDRN worth it if the results are subtle?

That depends on your goals and budget. Our guide is PDRN worth it? weighs cost, format and evidence, and what age should you start PDRN? looks at timing.

Related reading

• What is PDRN in skincare?
• PDRN clinical evidence review
• Does topical PDRN work?
• Rejuran vs PDRN
• Are PDRN injections safe?
• Best Korean PDRN skincare in the UK
• PDRN serums and PDRN creams

References

1. Lampridou S, Bassett S, Cavallini M, Christopoulos G. The effectiveness of polynucleotides in esthetic medicine: a systematic review. J Cosmet Dermatol. 2025;24(2):e16721.

2. Alhussain AM, Turki M Albusayys S, Alfhadi MA, et al. Polynucleotides and polydeoxyribonucleotides for skin rejuvenation, postoperative scar prevention, and wound healing: a systematic review of randomized clinical trials. Cureus. 2026;18(7):e112403.

3. Lee YJ, Kim HT, Lee YJ, et al. Comparison of the effects of polynucleotide and hyaluronic acid fillers on periocular rejuvenation: a randomized, double-blind, split-face trial. J Dermatolog Treat. 2022;33(1):254–260.

4. Araco A, Araco F. Preliminary prospective and randomized study of highly purified polynucleotide vs placebo in treatment of moderate to severe acne scars. Aesthet Surg J. 2021;41(7):NP866–NP874.

5. Amado R, Al-Mukhtar Y, Lanza E, et al. A real-world study of polynucleotides HPT for treating periorbital hyperpigmentation. Clin Cosmet Investig Dermatol. 2026;19:605046.

6. Ye R, Wang Q, Du L, Li L, Hu F, et al. Topical medium-length PDRN enhances dermal extracellular matrix repair in photodamaged skin via PI3K-Akt/TGF-β-regulated pathways. PLoS One. 2026;21(7):e0350905.

7. Khan RS, Hafeez K. Hyaluronic acid fillers versus polynucleotides for under-eye rejuvenation. J Clin Med. 2026;15(13):4971.

8. Committee of Advertising Practice. Cosmetic interventions: advertising guidance (broadcast and non-broadcast). ASA | CAP.

9. NHS. Choosing who will do your cosmetic procedure. Reviewed June 2026.

10. NHS. Sunscreen and sun safety.

11. MHRA. Yellow Card scheme.

This article is for general information only and is not a substitute for personalised advice from a pharmacist, GP or other qualified healthcare professional. If you have a reaction or a medical concern, seek professional advice.