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NKD Koala Vitamin C Serum 30 ml dropper bottle on a soft mist background
Hero ingredients: 10% vitamin C, ferulic acid, CoQ10 and vitamin E
How to use the Vitamin C Serum in the morning, followed by moisturiser and SPF
Smiling model holding the Vitamin C Serum at her cheek, with callouts for vitamin C, ferulic acid, CoQ10 and vitamin E
Model with eyes closed holding the Vitamin C Serum against her cheek
Found in these Rituals: the Vitamin C Serum is part of the Glow & Brightening and Full Face Rituals
Targeted serum, 30ml

Vitamin C Serum

In your routine CleanseSerumMoisturiseSPF

10% pure vitamin C (ascorbic acid, second on the ingredient list) with Ferulic Acid, CoQ10 and Vitamin E. A morning serum for the look of dullness and uneven tone. Made in Melbourne.

Size
30ml

15% off any 3 formulas, applied automatically in your bag. Mix and match

Free shipping on Australian orders over $75

Or 4 payments of $8.00 with Afterpay

Not sure it suits your skin? Take the 60-second skin quiz

Goes well with

Glow & Brightening RitualWith the Gentle Face Wash and Kojic Acid Moisturiser. Save 15% on all three together.
$79
Helps with
  • Dullness
  • Dark spots
  • Uneven tone
  • Environmental stress
  • Tired skin
How to use

Apply 2 to 3 drops to clean, dry skin in the morning. Press gently and allow to fully absorb before moisturiser and SPF. Can also be used in the evening as part of a brightening routine.

Key ingredients
  • Ascorbic Acid: pure vitamin C, second on the list
  • Ferulic Acid: helps stabilise the vitamin C
  • Ubiquinone (CoQ10): extra antioxidant support
  • Tocopherol (Vitamin E): completes the antioxidant trio
The formula

What makes the Vitamin C Serum different?

Pure vitamin C, not a derivative. 10% Ascorbic Acid sits second on the ingredient list, paired with Ferulic Acid, which helps keep it stable. CoQ10 and Vitamin E add further antioxidant support against daily environmental stress. Fast-absorbing, with no residue.

Who it's for. Dull, tired-looking skin, uneven tone or the look of dark spots. Use it in the morning under SPF. If your skin is reactive, start every second morning.

What to expect. Pure vitamin C can tingle at first. Brightening is gradual and comes with consistent daily morning use, with SPF. Keep the bottle closed and away from light and heat.

Key actives
10% ascorbic acid (vitamin C), ferulic acid, CoQ10, vitamin E
Good for
Dullness, uneven tone and the look of dark spots
Feels like
Fast-absorbing, with no residue
Fragrance
Contains fragrance (parfum)
When to use
Mornings, before moisturiser and SPF
Value
30ml at $1.07 per ml. 15% off in the Glow & Brightening Ritual or on any 3 formulas
Application

How do I use the Vitamin C Serum?

  1. 01

    Cleanse first

    Start with your Gentle Face Wash or Gel Cleanser in the morning.

    Pat skin dry before applying.

  2. 02

    Apply in the morning

    Press 2 to 3 drops into clean, dry skin and allow to absorb fully.

    Layer under your moisturiser.

  3. 03

    Always follow with SPF

    Vitamin C works best alongside daily sun protection. SPF is non-negotiable when using this serum.

    SPF 30+ minimum every morning.

Always apply SPF after this serum in the morning. Vitamin C and daily sun protection work best together.

Model holding the Vitamin C Serum up to the camera
What's inside

What is in the Vitamin C Serum?

  • Ascorbic Acid10%

    Pure vitamin C, sitting second on the ingredient list. Helps brighten the look of dullness and even the appearance of skin tone.

  • Ferulic Acid

    Helps stabilise ascorbic acid and support its antioxidant activity.

  • Ubiquinone (CoQ10)

    A coenzyme antioxidant that adds a second layer of support against daily environmental stress.

  • Tocopherol (Vitamin E)

    Works alongside vitamin C and ferulic acid to complete the antioxidant network.

Full ingredient list

Aqua, Ascorbic Acid, Propanediol, Undecane, Tridecane, Polyacrylamide, C13-14 Isoparaffin, Laureth-7, Disodium EDTA, Ubiquinone, Ferulic Acid, Benzyl Alcohol, Salicylic Acid, Glycerin, Sorbic Acid, Parfum, Tocopherol.

What does each ingredient do? Read the glossary
Warnings and storage

For external use only. Always follow with SPF. Contains fragrance. Avoid contact with eyes and broken skin. Patch test before first use. Discontinue if irritation occurs. Keep out of reach of children. Store away from direct sunlight and heat.

Compare all our face serums, or see every formula.

From the journal: Kakadu plum: one of the richest natural sources of vitamin C

Works well together

Complete your Ritual

Cleanse first, seal with the Kojic Acid Moisturiser, then finish with SPF.

The full routine Glow & Brightening Ritual

With the Gentle Face Wash and Kojic Acid Moisturiser. Save 15% on all three together.

$79
Before: CleanseGentle Face Wash

Prep skin before actives.

$28
After: MoisturiseKojic Acid Moisturiser

Layer over this serum to continue the brightening routine.

$34

The Vitamin C Serum is part of these Rituals: Glow & Brightening Ritual and Full Face Ritual.

Reviews

From the Rituals with this formula

These are reviews of the full Ritual, which includes the Vitamin C Serum.

Glow & Brightening Ritual

5.0
Rated 5.0 out of 5 stars
Based on 1 review
100%would recommend this product
Slide 1 selected
1 review
  • AM Profile picture for Ashley M.
    Ashley M.
    Verified Reviewer
    I recommend this product
    Skin concerns Breakouts, Dryness
    Age range 25–34
    Rated 5 out of 5 stars
    3 days ago
    my new skincare routine

    i love this range so much 🤩 the cleanser feels gentle on my sensitive skin, and doesn’t leave it feeling tight, yet still cleans deep into my pores. the serum is lightweight and doesn’t feel sticky on the skin at all. the moisturiser is my hero item; it’s so hydrating & lightweight. i love how it feels as i apply it and how my skin feels after! good skincare doesn’t need to be a million steps! just 3 and my skin feels amazing!

About this formula

Questions about the Vitamin C Serum

What form of vitamin C is in the NKD Koala Vitamin C Serum?

Pure vitamin C, listed as Ascorbic Acid, second on the ingredient list. It is paired with Ferulic Acid, CoQ10 (Ubiquinone) and Vitamin E (Tocopherol).

Should I use the Vitamin C Serum in the morning or at night?

In the morning, on clean dry skin, under your moisturiser. Always follow with SPF 30 or higher.

Can I use the Vitamin C Serum with the Retinol Serum?

Use them at different times of day: Vitamin C in the morning and Retinol at night. NKD Koala does not recommend using them in the same routine.

Can I use it with niacinamide?

Yes. Vitamin C and niacinamide can be used together, so the Vitamin C Serum and the Anti-Acne Serum can be layered.

Why does the Vitamin C Serum tingle?

Pure vitamin C (ascorbic acid) is acidic, so a light tingle for a minute or two is common at first. If it stings or skin stays red, use it every second morning or stop.

How long until I see a difference with the Vitamin C Serum?

Brightening is gradual and builds with consistent daily morning use and SPF. Every skin responds at its own pace.

How should I store the Vitamin C Serum?

Keep the cap closed and store it away from light and heat. Pure vitamin C reacts with air and light over time.

Can I use the Vitamin C Serum with the Kojic Acid Moisturiser?

Yes. The Glow & Brightening Ritual pairs them: Vitamin C Serum first in the morning, then the Kojic Acid Moisturiser, then SPF.

More answers in the FAQs and the ingredient glossary.