PDRN vs Hyaluronic Acid: Which Should You Choose?

Short answer: PDRN and hyaluronic acid do different jobs. Hyaluronic acid is a proven humectant that draws water into skin, and as an injection it adds hydration or volume. PDRN is thought to support repair and skin quality, mainly when injected. In skincare, both mainly hydrate. Many products combine them, and you do not have to choose.

PDRN vs hyaluronic acid is a question that comes up in two places: in your skincare routine and in the clinic. Hyaluronic acid (HA) has been a staple of skincare and aesthetics for years. PDRN is the newer "salmon DNA" ingredient. This guide explains how they differ in serums and in injections, where each works best and why you might want both. For the injection side, also see is PDRN a filler.

Key takeaways

• Hyaluronic acid is a humectant: it holds water and improves hydration in skincare.

• A systematic review of 13 studies found injectable HA improved facial skin hydration, firmness, texture and elasticity[1].

• A 2026 review found HA fillers remain superior for structural correction under the eyes, while polynucleotides improve skin quality, with limited evidence[2].

• PDRN is thought to work through A2A receptors and nucleotide supply, which HA does not[3].

PDRN vs hyaluronic acid at a glance

In skincare: PDRN serum vs hyaluronic acid serum

Hyaluronic acid, often listed as sodium hyaluronate, is one of the most reliable hydrating ingredients in skincare. It works on the skin surface by attracting and holding water. It is gentle, cheap and suits almost every skin type.

PDRN in skincare also mainly hydrates. Its large DNA fragments penetrate intact skin poorly[5], although a 2026 study detected a medium-length PDRN in the upper living epidermis in lab skin models and one volunteer[6]; that does not show it reaches the dermis in useful amounts. Most PDRN serums also contain hyaluronic acid. If you are choosing between a plain HA serum and a PDRN serum, the HA serum is usually the cheaper way to get hydration; the PDRN serum may add a little more, but evidence is limited. Read does topical PDRN absorb into skin for detail.

In the clinic: PDRN injections vs hyaluronic acid injections

Injectable hyaluronic acid comes in two main forms. Skin boosters use lightly cross-linked or non-cross-linked HA to hydrate the dermis. Dermal fillers use heavily cross-linked HA to add volume, for example in lips, cheeks or tear troughs. PDRN and polynucleotide injections are not fillers; they aim to improve skin quality rather than shape.

A 2026 review comparing HA fillers with polynucleotides for under-eyes concluded that HA remains the gold standard for volume, while polynucleotides consistently improve elasticity, hydration and fine lines, with a favourable safety profile[2]. The authors noted that study designs and products vary, limiting firm conclusions[2].

What the evidence says about PDRN vs hyaluronic acid

For injectable HA, a 2023 systematic review of 13 studies found significant improvements in hydration, firmness, brightness, texture, radiance and elasticity, with high satisfaction and a good safety record[1]. The authors called for larger randomised trials.

For PDRN and polynucleotides, systematic reviews report improvements in skin quality and scars but highlight small studies and short follow-up[4,7]. A 2026 review specifically comparing the two around the eyes called for direct comparative trials, so claims that one is better overall are not proven[2].

Interestingly, several products combine PN with HA. A 2026 real-world study of 30 patients with moderate to severe acne scars used a combined polynucleotide and HA injection; scar scores fell by about 22% at six months, but 30% of patients did not improve their scar grade, and there was no comparison group[8]. In a mouse model of eczema, PN plus HA worked better than PN alone[9]. These suggest the two may complement each other, but more research is needed.

Practical tip: If your main goal is hydration on a budget, a simple hyaluronic acid serum under moisturiser and sunscreen does the job. A PDRN product is an optional extra for an established routine, not a replacement for the basics.

When to choose PDRN, HA or both

How to use PDRN and hyaluronic acid together

1. Cleanse and leave skin slightly damp.

2. Apply a hyaluronic acid serum or essence.

3. Apply your PDRN serum, or use a single product containing both.

4. Seal with a moisturiser, which stops HA drawing water out of skin in dry air.

5. In the morning, finish with sunscreen; the NHS recommends at least SPF 30 with 4-star UVA protection[10].

Who should take care

• Fish allergy: avoid salmon-derived PDRN[3].

• Filler history: tell your practitioner about previous fillers before any injection.

• Pregnancy or breastfeeding: avoid elective injections; HA skincare is generally fine.

• Active infection or cold sores: postpone injections.

Is a combination product better?

Many skin boosters now combine polynucleotides with hyaluronic acid in one syringe, and many PDRN serums also contain hyaluronic acid. The idea is that HA adds immediate hydration while PDRN or PN supports longer-term skin quality. Evidence for the combination is early and uncontrolled: a real-world study in acne scars used a PN and HA combination product[8], and in a mouse model the combination outperformed polynucleotides alone[9]. However, there are no large trials comparing combination products with each ingredient alone in people, so any extra benefit is not proven.

The bottom line

PDRN and hyaluronic acid are partners more than rivals. In skincare, both mainly hydrate, and hyaluronic acid is the cheaper, better-proven option. In injections, HA fillers add volume, HA skin boosters hydrate and polynucleotides target skin quality. Choose based on your goal, and remember many products combine both.

FAQs

Is PDRN better than hyaluronic acid?

They do different things. HA has stronger evidence for hydration; PDRN is studied for repair and skin quality[1,4].

Can I use PDRN and hyaluronic acid together?

Yes. Many products contain both, and no problems have been reported with layering them.

Is a PDRN injection a type of filler?

No. It does not add volume like an HA filler[2].

Which is better for under-eyes, HA or polynucleotides?

HA fillers for hollows; polynucleotides for crepey skin[2].

Does PDRN last longer than hyaluronic acid boosters?

Not established. Clinics often suggest top-ups for both, but long-term data are limited.

Related reading

• Is PDRN a Filler?

• PDRN for Dark Circles

• Does Topical PDRN Absorb Into Skin?

• Best PDRN Serum UK

References

1. Ghatge AS, Ghatge SB. The effectiveness of injectable hyaluronic acid in the improvement of the facial skin quality: a systematic review. Clin Cosmet Investig Dermatol. 2023;16:891–899.

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

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

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

5. Bos JD, Meinardi MM. The 500 Dalton rule for the skin penetration of chemical compounds and drugs. Exp Dermatol. 2000;9(3):165–169.

6. Ye R, Wang Q, Du L, 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. 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).

8. Bartoletti E, Trocchi G, Fiorini I, et al. Polynucleotides High Purification Technology: a real-world prospective study in a hospital outpatient setting supports PN HPT as a regenerative medicine option for acne scar management. Clin Cosmet Investig Dermatol. 2026;19:621545.

9. Ha YJ, Tak KH, Lee JL, et al. Polynucleotides enhance skin barrier function and reduce inflammation in a 2,4-dinitrochlorobenzene-induced mouse model of atopic dermatitis. Skin Res Technol. 2025;31(6):e70189.

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

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.