What is PDRN, and why is it called salmon DNA skincare?

PDRN stands for polydeoxyribonucleotide, a mixture of DNA fragments. Salmon-derived materials are one source used in PDRN research, which explains the salmon DNA nickname. Check the ingredient list and source information for the particular product.

Is PDRN better than retinol?

There is no universal winner. Compare the evidence for the specific products and the concern you want to address. Retinol can cause irritation, and the PDRN name alone does not establish that a cream will suit sensitive skin.

What should I check before buying a PDRN cream?

Check the full ingredient list, what any concentration or purity figure measures, the exact formula and pack size, and evidence supporting the product claims. Read the directions and choose a sales channel you can verify.

Does a higher PDRN ppm mean a better cream?

A concentration number is only comparable when it describes the same material on the same basis. Ask whether it refers to a raw-material blend or the DNA ingredient in the finished formula. Concentration alone does not establish overall product performance.

What is the difference between PYDERIN and REJUVUSTER?

PYDERIN products are sold through partner clinics, and REJUVUSTER products through partner pharmacies. Use the comparison table and individual product pages to check each formula, pack size and sales channel.

PDRN skincare guide: ingredients, benefits and how to choose a cream

By PYDERIN · Updated October 19, 2026

Explore the ingredient behind PDRN skincare, understand what the research can tell you, and compare creams using the details that matter for your daily routine.

What is PDRN?

PDRN stands for polydeoxyribonucleotide, a mixture of DNA fragments. Research has used purified DNA from salmon or trout, which explains the term salmon DNA skincare.^[1]

On PYDERIN product ingredient lists, the DNA ingredient is identified as Sodium DNA. The full list also shows the other ingredients that make up the cream. Always check the product page and the packaging for the formula you purchase.

Read research in context. A study of an ingredient is not a test of a finished cream. A result reported for one formula does not establish the performance of another.

What does PDRN do in skincare?

In cosmetic ingredient lists, PDRN appears as Sodium DNA and is used as a skin-conditioning ingredient: it helps the skin surface hold moisture so it feels smooth and supple.

How to read a skincare claim

Research on an ingredient and a test of a finished product answer different questions. When reading a skincare claim, match it to the outcome actually measured:

Firmness and fine lines: look for measurements from a study of the exact formula, and for functional-cosmetic documentation where a claim requires it.
Comfort: check who took part and how tolerability was assessed.
Hydration: look for results that distinguish skin moisture from water loss.

This distinction helps you compare what is known about an ingredient with what has been demonstrated for a product you can buy.

PDRN vs. other skincare ingredients

These ingredients have different roles. Use this overview to decide what to investigate, then compare the complete formulas rather than choosing on the ingredient name alone.

Ingredient roles and what to check before choosing
Ingredient	Role or research focus	What to check
PDRN	A skin-conditioning ingredient, listed as Sodium DNA, that helps skin hold moisture.	The ingredient-list name and what any concentration figure measures.
Retinol	A vitamin A derivative used for concerns such as fine lines and uneven tone.^[2]	Strength, directions and tolerability; dryness or irritation can occur.
Peptides	Some specific peptides have been studied for the appearance of fine lines.^[3]	The named peptide and finished formula; findings are not interchangeable across all peptides.
Hyaluronic acid	A moisturizing ingredient used in hydration-focused skincare.^[4]	The overall moisturizer texture and suitability for your skin.
Niacinamide	A form of vitamin B3 studied for visible tone and texture concerns.^[5]	The tested concentration, complete formula and claimed outcome.

PDRN or retinol? Your choice depends on your goal and the specific products. A PDRN cream is not automatically a substitute for retinol, and its name alone does not establish that it is less irritating. Introduce new products carefully instead of changing several parts of your routine at once.^[6]

How to choose a PDRN cream: four checks

Ingredient identity and source. Read the full ingredient list. If a purity figure is published, check which raw material it describes and how it was measured.
Concentration and its basis. Ask whether a percentage or ppm figure refers to a supplied ingredient blend or to the DNA ingredient in the finished cream. Compare figures only when their definitions match.
Formula and supporting evidence. Check the other ingredients, directions and finished-product test results. A molecular-weight number alone does not demonstrate how a particular cream performs on skin.
The exact product and its claims. Match the product name, pack size and label to the official listing. For a functional-cosmetic claim, ask for documentation for that specific product and claimed function.

A useful test summary identifies the formula, participant group, study duration and measured result. A general ingredient paper is background information, not a test report for every product containing that ingredient.

How to use a PDRN cream in your routine

Follow the directions on your product label. A simple routine can include the steps below; toner and serum are optional. If you use a prescribed treatment, follow your clinician's instructions for its place in the routine.^[6]

Cleanse. Use a gentle cleanser and pat your skin dry.
Toner, if used. Follow its label directions and choose a product your skin tolerates.
Serum or ampoule, if used. Apply according to its directions. You do not need every product in a range to build a routine.
Cream. Apply the amount and frequency stated on the label. Adjust your routine if your skin becomes irritated.
Daytime sun protection. Include a broad-spectrum sunscreen with SPF 30 or higher and follow its application directions.^[4]

Before using a new product widely, try it on a small area as described in the American Academy of Dermatology's testing guide. Stop using it if a reaction develops.^[7]

Who might consider PDRN skincare?

People comparing daily creams: consider the texture, full ingredients and the product's stated purpose.
People focused on firmness and hydration care: check the evidence for the particular outcome a product claims.
People with sensitive skin: review the entire formula and test a new product before broader use.^[7]

Your age or interest in PDRN alone does not determine which product is right for you. The formula, directions and your skin's response are more useful starting points.

Compare PYDERIN and REJUVUSTER creams

PYDERIN products are sold through partner clinics, and REJUVUSTER products through partner pharmacies. The table uses current information from our product catalog. Open each product page for the full ingredient list and details.

Product pack sizes and sales channels (full ingredients on each product page)
Product	Size	Sales channel
REJUVUSTER PDRN Rejuvenating Cream	25ml	Partner pharmacies
PDRN Lift Cream	30ml	Partner clinics

Where to buy

Find PYDERIN partner clinics and REJUVUSTER partner pharmacies using the official location pages. Contact the location before visiting to confirm the exact product, pack size, price and availability.

Frequently asked questions

What is PDRN, and why is it called salmon DNA skincare?: PDRN stands for polydeoxyribonucleotide, a mixture of DNA fragments. Salmon-derived materials are one source used in PDRN research, which explains the salmon DNA nickname. Check the ingredient list and source information for the particular product.
Is PDRN better than retinol?: There is no universal winner. Compare the evidence for the specific products and the concern you want to address. Retinol can cause irritation, and the PDRN name alone does not establish that a cream will suit sensitive skin.
What should I check before buying a PDRN cream?: Check the full ingredient list, what any concentration or purity figure measures, the exact formula and pack size, and evidence supporting the product claims. Read the directions and choose a sales channel you can verify.
Does a higher PDRN ppm mean a better cream?: A concentration number is only comparable when it describes the same material on the same basis. Ask whether it refers to a raw-material blend or the DNA ingredient in the finished formula. Concentration alone does not establish overall product performance.
What is the difference between PYDERIN and REJUVUSTER?: PYDERIN products are sold through partner clinics, and REJUVUSTER products through partner pharmacies. Use the comparison table and individual product pages to check each formula, pack size and sales channel.
Where can I buy PYDERIN or REJUVUSTER?: Use the official clinic and pharmacy finders linked below. Contact the location before visiting to confirm the exact product, pack size, price and current availability.

More PDRN guides

Does PDRN cream absorb into the skin?
How far into the skin does PDRN in a cream go? We look at the stratum corneum, the 500 Dalton rule and the evidence to see where PDRN averaging 97 kDa ends up.
What do 10,000 ppm, 99% purity and 97 kDa on a PDRN label tell you?
Is PDRN 10,000 ppm a raw-material or finished-product figure? Learn to convert ppm, find Sodium DNA on ingredient lists and read purity and size on a CoA.
PDRN, PN and Sodium DNA: what’s the same and what’s different?
How do PDRN and PN differ? We explain the size cutoff, why ingredient lists say Sodium DNA and how to check the origin and species of salmon raw material.
PDRN cream: what to use with it and what to use separately
What to use with PDRN cream and what to keep apart: choosing panthenol, ceramides, niacinamide or adenosine by concern, and spacing out retinol and exfoliants.
Skin type before concerns: how to build a PDRN routine
Build your PDRN routine on skin type first: check it 30 minutes after cleansing, pick ingredients for oily, dry or sensitive skin and see AM/PM examples.

Explore the products and find a local stockist

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Sources and further reading

The resources below support the general ingredient and skincare explanations. They are not clinical studies of PYDERIN or REJUVUSTER finished products.