Polynucleotide Serum vs Moisturiser | What’s the Difference and Do You Need Both?
Pure Tone Journal · Skincare Comparison
Polynucleotide Serum vs Moisturiser: What’s the Difference and Do You Need Both?
They both contain polynucleotides. They both support changing skin. But a serum and a moisturiser are not interchangeable.
The Pure Tone Aesthetics x Kimberley Walsh Polynucleotide Serum and Polynucleotide Moisturising Cream were created to do two different jobs within the same routine. Understanding that difference makes it much easier to decide whether you need one, the other — or both.
The short version
Serum Treats. Moisturiser Supports.
That is the simplest way to understand the difference.
The Polynucleotide Serum is the lighter treatment step. It is applied after cleansing and is formulated with ginseng-derived PDRN, multi-molecular hyaluronic acid and Centella Asiatica to support hydration, elasticity, smoothness and overall visible skin quality.
The Polynucleotide Moisturising Cream is the final moisturising step. It combines PDRN with multi-molecular hyaluronic acid, niacinamide and other supporting ingredients to help maintain hydration, skin comfort and barrier function.
You can use either product independently. But if you want the complete routine, they are designed to be layered: serum first, moisturiser second.
Do You Need Both?
Not necessarily. Your routine should reflect what your skin needs and what you will use consistently.
If you already have a moisturiser you love, adding the serum can give you a dedicated treatment step. If hydration and barrier support are your main priorities, the moisturiser can make sense on its own. If you want the complete Pure Tone routine, use both.
Side by side
Polynucleotide Serum vs Moisturiser
They share some ingredients, but their textures, position in the routine and primary purpose are different.
| Difference | Polynucleotide Serum | Polynucleotide Moisturising Cream |
|---|---|---|
| Main role | Treatment step | Moisturising and barrier-support step |
| When to use | After cleansing | After serum as the final skincare step |
| Texture | Lightweight and fast absorbing | Richer cream texture designed to nourish without feeling unnecessarily heavy |
| Key ingredient story | Ginseng-derived PDRN, multi-molecular hyaluronic acid and Centella Asiatica | PDRN, multi-molecular hyaluronic acid, niacinamide and supporting moisturising and soothing ingredients |
| Main focus | Visible skin quality, hydration, elasticity and smoother-looking texture | Hydration, comfort, moisture retention and skin-barrier support |
| Can I use it alone? | Yes — followed by your usual moisturiser | Yes — either on its own or after another suitable serum |
| If using both? | Use first | Use second |
Step 02 · Treat
What Does the Polynucleotide Serum Do?
Think of serum as the more targeted treatment stage of the routine.
Serums are typically lighter than moisturisers, which allows them to sit comfortably beneath the products that follow.
The Pure Tone Aesthetics x Kimberley Walsh Polynucleotide Serum was formulated specifically for skin showing visible signs of ageing or change, including loss of smoothness, reduced elasticity, dehydration and tired-looking skin.
Its core formulation combines ginseng-derived polynucleotides (PDRN) with multi-molecular hyaluronic acid and a Centella Asiatica complex.
- Lightweight treatment step used after cleansing
- Supports the appearance of smoother, firmer-looking skin
- Provides multi-level hydration without a heavy finish
- Supports visible elasticity and overall skin quality
- Designed for consistent morning or evening use
- Layers beneath moisturiser and SPF
Step 03 · Moisturise
What Does the Polynucleotide Moisturising Cream Do?
Moisturiser has a different job: completing the routine and supporting hydration and barrier function.
As skin changes, maintaining moisture can become more difficult. Skin may feel tighter, rougher or less comfortable, and fine lines can appear more noticeable when the skin is dehydrated.
The Polynucleotide Moisturising Cream combines PDRN, multi-molecular hyaluronic acid and niacinamide within a daily moisturiser designed to help replenish moisture, support the skin barrier and maintain comfort.
It also includes supporting ingredients such as beta-glucan, adenosine, allantoin and ginseng-derived components within the wider formulation.
- Final moisturising step in the routine
- Supports long-lasting hydration and moisture retention
- Helps maintain skin comfort
- Supports the skin barrier
- Helps soften the appearance of dehydration-related fine lines
- Can be used morning and evening
One ingredient · two different roles
Why Do the Serum and Moisturiser Both Contain Polynucleotides?
Because sharing an ingredient does not make two products duplicates. The formulation around that ingredient — and the job of the finished product — matters.
Serum
PDRN forms part of a lightweight treatment formula alongside multi-molecular hyaluronic acid and Centella Asiatica.
Moisturiser
PDRN sits within a richer moisturising formulation alongside hyaluronic acid, niacinamide and ingredients selected for hydration, comfort and barrier support.
Together
The two products allow the polynucleotide-led ingredient story to continue through complementary treatment and moisturising steps.
Make the choice simpler
Which Should You Choose?
Start with the role that is missing from your existing routine.
Choose the Serum If…
You already have a moisturiser you are happy with but want to add a more targeted treatment step focused on hydration, elasticity, texture and visible skin quality.
The serum fits between cleansing and whatever moisturiser you already use.
Choose the Moisturiser If…
Dryness, tightness, comfort or maintaining hydration are your immediate priorities and you want a moisturiser that also carries the PDRN ingredient story.
It can become the final step after an existing serum or form part of a simpler routine on its own.
Choose Both If…
You want the complete Pure Tone Aesthetics x Kimberley Walsh treatment and moisturising routine rather than mixing products from different ranges.
Use the serum first, allow it to settle, then follow with the moisturising cream.
Already Have a Routine You Like?
You do not need to replace everything at once. Introduce the step that makes most sense, use it consistently and build from there if your skin needs more.
A routine you actually use is more valuable than one that becomes too complicated to maintain.
Treatment + support
What Is the Benefit of Using Both?
The benefit is not simply getting “more PDRN”. It is giving two different stages of your routine two different jobs.
The serum gives you a dedicated treatment step before moisturising. The cream then follows to support hydration, comfort and the barrier while completing the routine.
That means you do not have to ask one product to do everything. The serum can remain lightweight and treatment-focused, while the moisturiser can provide the richer support expected from the final step.
For skin that is becoming drier, less supple or less predictable, that combination can make more sense than simply applying a heavier cream and hoping it addresses every concern.
Think: Treat, Then Support
Serum: targeted, lightweight treatment step.
Moisturiser: hydration, comfort and barrier-support step.
That distinction is the reason the products were created separately.
How to layer them
Which Goes First: Serum or Moisturiser?
Serum first. Moisturiser second.
01
Cleanse
Begin with Foaming Facial Cleansing Gel to remove daily build-up and prepare the skin.
02
Apply Serum
Apply Polynucleotide Serum to the face and neck and allow it to absorb before moving to the next step.
03
Moisturise
Follow with Polynucleotide Moisturising Cream to complete the routine and support hydration and comfort.
Morning
Finish With SPF
When using the routine during the day, finish with an appropriate broad-spectrum sunscreen.
A few useful distinctions
Serum and Moisturiser Aren't Competing Products
The question is less “which one is better?” and more “what does my routine need?”
Is Serum More Powerful?
Not in a way that makes moisturiser unnecessary. Serum is designed for a different role and texture. Moisturiser remains important when your routine needs hydration, comfort and barrier support.
Is Moisturiser Just for Dry Skin?
No. Moisturising helps support hydration and barrier function across different skin types. The amount and texture you prefer may vary according to your skin.
Do I Need Two PDRN Products?
No. Using two products is a routine choice rather than a requirement. They are designed to complement one another, but either can be introduced independently.
Can I Mix Them With Other Brands?
Yes. You can use the Polynucleotide Serum beneath another suitable moisturiser, or use the Polynucleotide Moisturising Cream after another compatible serum.
Pure Tone Aesthetics x Kimberley Walsh
Build the Routine That Works for You
Start with the serum, choose the moisturiser, or use both as part of the complete three-step collection.
Serum · moisturiser · PDRN
Polynucleotide Serum vs Moisturiser FAQs
What is the main difference between polynucleotide serum and moisturiser?
The serum is a lightweight treatment step applied after cleansing. The moisturiser is the final hydration and barrier-supporting step. Although both contain polynucleotides, their formulations and roles within the routine are different.
Do I need both polynucleotide serum and moisturiser?
No. They are designed to complement each other but can be used independently. If you already have a moisturiser you like, you can introduce the serum as your treatment step. If hydration and barrier support are your priority, you may choose the moisturiser. Using both creates the complete treatment-and-moisturise routine.
Which goes first: polynucleotide serum or moisturiser?
Apply the Polynucleotide Serum first after cleansing, allow it to absorb, then follow with Polynucleotide Moisturising Cream.
Why do both products contain PDRN?
PDRN forms part of two different formulations. In the serum it sits within a lightweight treatment formula alongside multi-molecular hyaluronic acid and Centella Asiatica. In the moisturiser it forms part of a richer hydration and barrier-support formula with ingredients including hyaluronic acid and niacinamide.
Can I use the Polynucleotide Serum with another moisturiser?
Yes. The serum can be used as the treatment step beneath another suitable moisturiser if you already have one that works well for your skin.
Can I use the Polynucleotide Moisturising Cream without the serum?
Yes. The moisturiser can be used on its own as your moisturising step or after another compatible serum.
Is a serum better than a moisturiser for fine lines?
They serve different purposes. The Polynucleotide Serum is designed as a targeted treatment step focused on visible skin quality, hydration, elasticity and smoothness. The moisturiser helps maintain hydration and barrier support, which can also make dehydration-related fine lines appear less noticeable. One does not make the other unnecessary.
Can I use both morning and evening?
Yes. Both products are designed for consistent daily use and can be incorporated into morning or evening routines. When used in the morning, finish with an appropriate broad-spectrum sunscreen.
Which product should I start with?
If you already have a moisturiser you are happy with and want a dedicated treatment step, start with the Polynucleotide Serum. If dryness, hydration and skin comfort are your immediate concerns, the Polynucleotide Moisturising Cream may be the more natural starting point. You can add the second product later if you want the complete routine.
The simple answer
You Don't Have to Choose. But You Don't Have to Use Both Either.
The Polynucleotide Serum and Polynucleotide Moisturising Cream share part of their ingredient story, but they were created for different stages of your routine.
Choose the serum when you want a dedicated treatment step. Choose the moisturiser when hydration, comfort and barrier support are your priority. Use both when you want the complete treat, then support approach.
What matters most is building a routine that makes sense for your skin — and one you can use consistently.
High-performance skincare · simplified
Treat. Moisturise. Or Do Both.
Explore the Pure Tone Aesthetics x Kimberley Walsh Polynucleotide Serum and Moisturising Cream individually or discover the complete three-step collection.