What Age Should You Start PDRN?

Short answer: There is no age at which PDRN becomes necessary. PDRN skincare is an optional hydrating extra for adults. Whether to consider PDRN injections depends on a specific concern, such as crepey under-eye skin, not on reaching a certain age, and they are for adults only. At any age, daily sunscreen does more to prevent ageing than PDRN.

What age should you start PDRN? Social media suggests everyone needs "salmon DNA" in their 20s. The reality is more nuanced. Skin changes gradually with age, and what makes sense at 25 is different from what makes sense at 50. This guide explains when PDRN skincare and PDRN injections are worth considering, and what to prioritise first. For an overview of whether it is worth the money at all, see is PDRN worth it.

Key takeaways

• Skin collagen decreases with age, and is lower in women than men at all ages[1].

• Sun exposure is a major driver of visible skin ageing; daily sunscreen helps prevent it[2].

• There is no evidence that starting PDRN early prevents ageing.

• In England, it is illegal to give botulinum toxin or dermal filler injections to under-18s for cosmetic purposes[3]. Reputable clinics also only offer PDRN injections to adults.

PDRN by age at a glance

Why age matters for PDRN

From early adulthood, the dermis gradually loses collagen. A classic study measuring forearm skin found collagen decreased with age and was lower in women at every age[1]. The rate varies hugely between people, depending on genetics, sun exposure, smoking and hormones. Menopause also speeds up skin thinning for many women.

PDRN injections are thought to support repair and the dermal matrix[4,5]. That makes them more relevant once there are changes to address, such as crepey under-eye skin, dullness or fine lines. In very young skin, there is little to improve, so benefit is unlikely.

PDRN in your 20s

In your 20s, the best investment is prevention: sunscreen every day, not smoking and treating acne early to avoid scarring. A PDRN serum or cream is fine if you enjoy it and it suits your skin, but you do not need one. PDRN injections are rarely needed at this age. One exception is acne scarring, where some clinics use polynucleotides alongside other treatments; this should be assessed by an experienced practitioner.

PDRN in your 30s

Many people notice the first fine lines, under-eye changes and loss of glow in their 30s. This is a sensible time to add a retinoid at night if you do not already use one. A PDRN cream can help with dryness from retinoids. Some people in their 30s choose polynucleotide injections for under-eyes or overall skin quality. Expect subtle results.

PDRN in your 40s and beyond

In your 40s and 50s, PDRN injections are most commonly considered. They can improve hydration, texture and crepiness, but they do not replace lost volume or lift sagging skin. Combining them with sunscreen and a retinoid gives the best overall approach. For routines, see Korean skincare routine for mature skin.

What the evidence says about the right age for PDRN

No study has tested the best age to start PDRN. Clinical trials of polynucleotides and PDRN mostly include adults with existing concerns, such as photo-ageing or scars, and report improvements in skin quality and scars[5,6]. These trials are small, and follow-up is short. There is no evidence that starting PDRN earlier prevents future ageing. "Prejuvenation" claims for injections in the 20s are not proven.

By contrast, the evidence for sun protection is strong at every age[2]. That is why we put sunscreen first, whatever your age.

Practical tip: Start from the concern, not the age. If what bothers you is acne marks, or dark circles caused by genetics or tiredness, PDRN is unlikely to be the answer; sunscreen, acne treatment and sleep usually matter more.

How to decide when to start PDRN

1. Identify the specific concern you want to improve.

2. Make sure you use sunscreen daily and have tried a retinoid if suitable.

3. Try a PDRN serum or cream first if you want a low-cost option.

4. If considering injections, book a face-to-face consultation with a qualified practitioner.

5. Ask what result is realistic for your age and skin, and how many sessions you will need.

6. Review progress with standardised photos.

Who should not start PDRN injections

• Under-18s: not appropriate for cosmetic injections; some product information lists under-18s as a reason not to treat.

• Pregnancy or breastfeeding: postpone elective injections.

• Fish allergy: most products are salmon-derived[4].

• Active skin infection or cold sores in the area.

• Blood thinners: speak to your GP or pharmacist first.

Licensing of non-surgical cosmetic procedures in England is planned but not yet in force[7]. Check your practitioner's training and insurance. Read are PDRN injections safe before booking.

Skincare vs skin booster injections by age

A PDRN cream or serum is a low-risk way to try the ingredient at any adult age. A PDRN skin booster injection is a medical procedure with small but real risks, such as bruising, swelling and, rarely, infection. That is why most practitioners suggest injections only when there is a clear concern to improve. If you are under 30 and simply curious, a topical product is the sensible first step. If you are over 35 and bothered by crepey under-eyes or dull, thin skin despite good skincare, a consultation about injections is reasonable.

The bottom line

There is no single age to start PDRN. PDRN skincare is a fine optional extra for adults of any age. PDRN injections are most often considered from the 30s onwards, when there are visible changes to improve, and only for adults. Whatever your age, daily sunscreen and, where suitable, a retinoid come first.

FAQs

Is 25 too young for PDRN?

Not for skincare. Injections are rarely needed at 25 unless treating a specific concern such as scarring.

Can teenagers use PDRN skincare?

Gentle PDRN skincare is unlikely to cause harm, but teenagers do not need it. Focus on cleansing, moisturiser and sunscreen.

What age is best for polynucleotide injections?

Most people consider them from their 30s or 40s, but it depends on your skin.

Does PDRN prevent wrinkles?

It is not proven to prevent wrinkles. Sunscreen is the best prevention[2].

Can you start PDRN in your 60s?

Yes. Expect improvements in hydration and texture, not lifting.

Related reading

• Is PDRN Worth It?

• Korean Skincare Routine for Mature Skin

• Are PDRN Injections Safe?

• Is PDRN Good for Skin?

References

1. Shuster S, Black MM, McVitie E. The influence of age and sex on skin thickness, skin collagen and density. Br J Dermatol. 1975;93(6):639–643.

2. NHS. Sunscreen and sun safety. Accessed October 2026.

3. Botulinum Toxin and Cosmetic Fillers (Children) Act 2021, section 1. legislation.gov.uk.

4. Squadrito F, Bitto A, Irrera N, et al. Pharmacological activity and clinical use of PDRN. Frontiers in Pharmacology. 2017;8:224.

5. The effectiveness of polynucleotides in esthetic medicine: a systematic review. J Cosmet Dermatol. 2025;24(2):e16721.

6. Alhussain AM, 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).

7. Department of Health and Social Care. The licensing of non-surgical cosmetic procedures in England: consultation response. GOV.UK, 7 August 2025.

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.