PDRN or Retinol  What to Choose When You Want Results Without Irritation

If you have ever used retinol, you probably know the trade-off: the promise of smoother, more even-looking skin in exchange for a careful adjustment period and sometimes dryness, peeling or redness. But what if your skin simply refuses to make that trade?

On 10 July 2026, PLOS One published an unusually direct comparison. A topical 0.1% PDRN formula with a defined molecular size was tested against a 0.1% retinol formula on opposite sides of the same participants’ eye area.

The result does not make retinol obsolete. It does mean that topical PDRN deserves more than trend status: in this short trial, it produced greater improvement than retinol across several measured periocular outcomes.

Short answer:

Retinol remains one of the best-studied anti-ageing ingredients. If your skin struggles with it, or you prefer a retinoid-free route, PDRN may be a promising alternative. In the 28-day study, 0.1% PDRN-850K outperformed 0.1% retinol on several measures of crow’s feet, dermal thickness and density, eye bags, elasticity and firmness. That result belongs to one specific formula and one short study; it does not make every PDRN product universally superior.

What is PDRN?

PDRN, short for polydeoxyribonucleotide, is a preparation of DNA fragments studied for their potential to support tissue repair. In topical skincare, researchers are investigating its effects on visible wrinkles, firmness and overall skin quality.

Laboratory studies suggest that certain PDRN preparations influence signalling pathways involved in the production of collagen and other structural skin proteins. However, evidence for topical PDRN is still developing. Research on injectable treatments does not automatically establish the benefits of a serum or cream, and results from one tested formula cannot be applied to every PDRN product.

What is retinol?

Retinol is a form of vitamin A used in skincare to improve the appearance of fine lines, uneven texture and signs of sun-related skin ageing. It belongs to the retinoid family and is converted within the skin into retinoic acid, which influences processes involved in skin renewal and collagen production.

Retinol has a more established research base than topical PDRN, although its effectiveness depends on concentration, stability and formulation. It can also cause dryness, peeling or irritation, particularly when introduced too quickly. Gradual introduction, moisturising and daily sun protection are important parts of a retinol routine.

Why PDRN has become more than a skincare trend

Retinol has decades of evidence behind it. It can improve fine lines, uneven texture and visible photoageing, yet dryness, peeling, stinging and redness can make continued use difficult. Formulation stability and gradual introduction matter.

PDRN, or polydeoxyribonucleotide, is a DNA-derived polynucleotide best known from injectable regenerative applications. The unresolved question for topical skincare has been whether such a large molecule can reach viable skin layers and trigger a measurable biological response. The 2026 paper addressed that question through penetration, cellular, ex vivo and clinical work rather than relying on a single cream test.

The split-face trial in detail

The prospective, randomized, double-blind split-face trial enrolled 31 healthy Chinese women aged 35–55 years, with a mean age of 47.5 ± 5.7 years. All reported sensitive skin and had bilateral periocular fine lines or wrinkles and eye bags.

·       One eye area received a cream containing 0.1% PDRN-850K.

·       The opposite side received a cream with the same base containing 0.1% retinol.

·       Both products were applied twice daily for 28 days.

·       Participants used sunscreen during the day.

·       Measurements were taken at baseline, day 14 and day 28.

The investigators measured wrinkle number and area with VISIA imaging, tear trough and eye-bag volume with Antera 3D, elasticity and firmness with a Cutometer, and dermal thickness and density with high-frequency ultrasound.

What changed after 28 days

Several outcomes improved on the PDRN-treated side by day 14. By day 28, the tested PDRN formula produced larger changes than the retinol control across most of the reported periocular endpoints.

These figures apply only to the tested formulas, population and 28-day study period.

The clearest consumer-facing result was the change in crow’s feet. Wrinkle area and count fell by approximately 20–23% on the PDRN side versus about 6–7% on the retinol side. Improvements in dermal thickness and density, eye-bag volume and tear-trough depression were approximately twice as large with PDRN. Elasticity and firmness improved by about 1.8 times as much.

What happened in cells and UV damaged skin models

In human dermal fibroblasts, PDRN-850K activated PI3K–Akt, TGF-β/Smad and autophagy-related signalling. Blocking these pathways reduced the PDRN-associated rise in COL1A1, COL3A1 and ELN gene expression, suggesting that several connected pathways contributed to the extracellular-matrix response.

In UV-irradiated ex vivo human skin, the 0.1% PDRN-850K formula increased viable epidermal thickness and raised levels of multiple collagen types, elastin, fibrillin-1 and the mechanotransduction regulator YAP. These laboratory and tissue-model results are not equivalent to long-term clinical proof for every finished cosmetic product.

Who may prefer a PDRN based routine

·       Someone who wants to support smoother, firmer-looking skin without retinol.

·       Someone whose previous retinol routine caused persistent dryness or discomfort.

·       Someone looking for hydration and barrier support alongside an active ingredient.

·       Someone who wants a clearly disclosed PDRN concentration on the label.

If your skin tolerates retinol well, there is no scientific reason to abandon it simply because PDRN is trending. PDRN’s value is the different, retinoid-free route it may offer.

Why percentage and ppm matter

The word PDRN on a label does not reveal the amount in the formula. For weight-based concentration, 10,000 ppm equals 1%.

A larger number does not automatically mean a better outcome. Molecular size, purity, stability, delivery vehicle and the rest of the formula determine how the product behaves. Matching a percentage does not establish clinical equivalence between two different formulas.

How a DermaGene PDRN routine can be layered

DermaGene NAD⁺ Radiant Longevity Serum contains 1,000 ppm, or 0.1%, PDRN as a lightweight daily first step. DermaGene PDRN 2000 Cellular Recovery Cream contains 2,000 ppm, or 0.2%, PDRN; Centella, a ceramide complex, panthenol, collagen and hyaluronic acid support its richer, barrier-focused role.

Apply the serum first and follow with the cream. If your skin is sensitive, introduce one new product at a time and patch test. The DermaGene products were not tested in the PLOS One trial, so the published 20–23% and fold-change results cannot automatically be attributed to these finished formulas.

Frequently asked questions about PDRN and retinol

Can PDRN and retinol be used together?

Yes, they may appear in the same routine, but sensitive skin should not introduce both at once. Test tolerability separately before combining them or alternating them on different days.

How quickly did PDRN work in the study?

Several outcomes improved by day 14, with the main comparison at day 28. This is not a guaranteed timeline for other products, facial areas or routines.

Is 2000 ppm twice as effective as 1000 ppm?

Not necessarily. It is twice the PDRN amount by weight, but clinical response may not rise linearly. Molecular size, vehicle and the full formulation also matter.

Can topical PDRN really penetrate the skin?

The 2026 paper found time-dependent PDRN-associated signal in viable skin regions across several models. The human penetration component was a one-person pilot and did not establish intracellular localisation at single-cell resolution.

Is PDRN less irritating than retinol?

A retinoid-free PDRN routine may feel more comfortable for some people, but both formulas were well tolerated in the study. The trial did not prove that every PDRN product is less irritating.

Did the study test DermaGene products?

No. It tested a defined PDRN-850K research eye cream and a retinol control with the same base. Product-specific testing would be required for clinical claims about DermaGene finished products.

What should I check when buying a PDRN product?

Look for a disclosed ppm or percentage, the complete formulation, clear directions and evidence that actually applies to the finished product. The ingredient name alone is not enough.

References

1. Original PLOS One paper. Ye R, Wang Q, Du L, Li L, Hu F. 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. doi:10.1371/journal.pone.0350905

2. Retinoid review. Zasada M, Budzisz E. Retinoids: active molecules influencing skin structure formation in cosmetic and dermatological treatments. Postepy Dermatol Alergol. 2019;36(4):392–397. doi:10.5114/ada.2019.87443

3. Clinical retinoid evidence review. Szymański Ł et al. Use of Retinoids in Topical Antiaging Treatments: A Focused Review of Clinical Evidence for Conventional and Nanoformulations. Adv Ther. 2022. doi:10.1007/s12325-022-02319-7

4. 0.1% stabilized retinol analysis. Efficacy and Tolerability of Topical 0.1% Stabilized Bioactive Retinol for Photoaging: A Vehicle-Controlled Integrated Analysis. J Drugs Dermatol. 2024;23(4). doi:10.36849/JDD.8124

Written by Anita Heizer, Founder of DermaGene®

Last reviewed: 2 October 2026

About the author

Anita Heizer

Founder of DermaGene®. This article is published as part of the DermaGene Journal, exploring skincare ingredients and the research behind them.