DPD UK Next Day Delivery - DHL Express Delivery Worldwide - European Customers please email customercare@katemciverskin.co.uk for assistance with your orders

Secret Weapon Hyaluronic Kakadu Serum


We are proud of the Hyaluronic Kakadu serum, which has outstanding multifunctional active ingredients for youthful, radiant skin and induces outstanding results on the skin. Transforming the appearance of dull, tired and dehydrated skin. 

Anti-ageing - Moisturising - Pro-Collagen  

Clinical trials back up the results on the appearance of wrinkles and skin radiance- 

  • Includes multi-weighted forms of Hyaluronic Acid
  • Extracted from the Australian Kakadu plum, the world’s highest source of vitamin C

Two results-driven ingredients brought together to Illuminate your skin, Protect and Reinforce the dermis for a beautiful skin aspect.  Extracted from Kakadu plum, the world’s highest vitamin C source and a Hyaluronic Acid with a mixed molecular weight of low, medium and high molecules will improve skin radiance & boosts skin luminosity.

Kakadu Plum ingredient has been clinically proven to after 1 month:

  • Reduce wrinkle volume by 41%
  • Reduce wrinkle length by 39%
  • Boosts skin tone and evenness by 14%
  • Reduces skin redness by 2.2%
  • Boosts skin brightness by 1.7%


  • Increases Antioxidant activity by 79%
  • Boosts New Collagen Synthesis by 144%
  • Stimulates VitC by 106%


  • Skin radiance enhancement after 15 days +21%
  • Skin radiance enhancement after 30 days +30%
  • 100% of the subjects demonstrated a positive effect.

If you want a high performing product that Induces skin brightening, reduces wrinkles and skin luminosity this product is for you. 

How to apply

3 drops each morning to a cleansed face, neck and décolletage.  YOUR FACE MUST BE DAMP/WET.  Follow with your preferred Secret Weapon Serum to seal the hydration of the Hyaluronic Serum.


100 X more in vitamin C content - Australian Superfruit extracted from the world’s richest source of vitamin C.  Extracted from the Australian Kakadu plum, the world’s highest source of vitamin C.  Protects and reinforces the dermis to reduce the appearance of ageing signs.

Skin benefits 

Energizes dull-looking skin - Improves the skin radiance & luminosity 
Induces skin brightening, reduces the appearance of skin redness and improves overall skin tone evenness. Reduces the appearance of wrinkles.  Cocktail of antioxidants helps reduce skin damage induced by oxidative stress—visible wrinkle reduction and skin luminosity booster.

This cocktail of antioxidants will help reduce skin damage induced by oxidative stress, stimulates the expression of SVCT-I, the vitamin C transporter of the skin and boost collagen production.

Gloss value is a parameter of the skin radiance. It defines the skin's ability to reflect the light and is directly linked to the skin surface quality.

Boosts collagen production

Kakadu has the same if not better antioxidant activity after 30 minutes and 24hours than vitamin C 
-Stimulates Hyaluronic Acid Synthesis 
-Stimulates Pro-Collagen I synthesis 
-Increases skin radiance and gloss by 10% after 10 days and 17% after 30 days. improves skin surface quality and therefore increases its luminosity 
-Skin is smoother/texture is reduced by 5% after 15 days and 11% after 30 days  

  • 2 groups of 20 women volunteers (A: Mean age of 47, B: mean age of 37).
    • Application of a 2% Kakadu cream or placebo on split-face & split-neck, 2x/day for 30 days.
    •Crow’s feet wrinkle measurement with derma TOP blue and B: Gloss value measurement with spectropolarimeter.


With a mixed molecular weight spectrum of low, medium and high molecular weight the ingredient will achieve the following results -

  • Better permeation than low and high HA used separately.
  • Enhances permeability of water-soluble actives
  • Enhances permeability of oil/lipo soluble actives - great to apply before Secret Weapon Serum
  • Enhances hydration and moisturisation- hydration is maintained after 2 hours and therefore a fantastic moisturiser.
  • Protects against short term dehydration
  • Increases skin elasticity
  • Increases skin smoothness
  • Short term reduction in wrinkles by approx 7% at 30 minutes and 3% at 4 hours
  • A decrease in wrinkle volume

Why is Kakadu Plum extract is great for Acne?

Vitamin C Clears Skin Redness 

One of the most observable effects of using a product with Vitamin C when dealing with acne is its ability to reduce skin inflammation and redness.   It also strengthens the tiniest of blood vessels - the capillaries. Capillaries are almost microscopic but crucial. They are in charge of bringing precious nutrients and oxygen to even the deepest levels of the skin.  It is these basal layers of skin cells that cause most of the redness on our face.  Vit C makes the blood vessels' walls stronger and reduces the instances of micro-bleeding, thereby making your skin look less red and inflamed. 

Ingredients -

Water - Aqua, Glycerin, Sodium Hyaluronate - Sodium Hyaluronate,  Phenoxyethanol and ethylhexylglycerin, Terminalia Ferdinandiana Fruit Extract, Aqua, Glycerin, Sodium Hyaluronate (mix of molecular weights-only 'sodium hyaluronate.'


If within 30 days post your purchase your skin isn't happy with the serum you are eligible for a full refund, you must log any concerns via email to customercare@katemciverskin.co.uk.  For the full T&C's go to our Returns Policy.


Customer Reviews

Based on 62 reviews
In LOVE with this product!

This is THE best addition that I've added to my skincare routine. Its give my 44 year old skin a boost! Looks more youthful, gives an instant glow. Love it!


I have been using this for just over a month and it’s actually unreal the effect it’s had on my skin.

I love it so much I took it away last weekend and had it on after my dip in the hot tub for extra effect,

My skin is super sensitive and this is one of a handful of products that doesn’t irritate it. I’ve had so many comments on how glowing and smooth my face is.

5 stars and then some...

Actual wizardry!

I have tried to switch up my skin care routine, whilst having time throughout lockdown and I came across this gem!
The results are amazing! My skin feels and looks fresher than ever!
I am getting married in 8 months and feel so lucky to have discovered this product as it has genuinely changed my life.
I have always had larger pores and shiny skin and this neutralises everything and makes me look fresh and dewy instead of shiny.
1000000% recommend! X

Totally Amazing!!!!

Skincare I just cannot live without! From the smell, the feel, the look of the packaging to the fact it all actually works and it’s not just another skincare gimmick, being in my early 40’s I’ve tried the lot!, I would give the whole range 10/10 and I’ve even treated myself to the candle and it smells divine. Even got my Son onto the original serum for his acne scared skin and he just loves it so much he now purchases it himself. xxx

Little bottle of magic!

Absolutely love this hyluronic serum. I’ve tried a lot of different brands and this one is by far the best. The packaging, the glass and everything about it feels so chic. My skin feels absolutely amazing when I use this. Its as if I’ve put on a moisturising face mask. Will definitely by again I’m obsessed!

★ Judge.me Reviews

Let customers speak for us

1787 reviews
In LOVE with this product!

This is THE best addition that I've added to my skincare routine. Its give my 44 year old skin a boost! Looks more youthful, gives an instant glow. Love it!

Fantastic as always

I can’t fault this trio at all. My skin is the best it’s ever been. Even down to the packaging-it’s so luxurious in my bathroom cabinet to using twice a day. I’m a loyal customer now for last couple of years and take advantage of offers too. Thanks guys!

Everything you need and more!

I highly recommend this product! I used the oil and the balm myself as well as the oil in my makeup kit. It meets all your skin care needs, it’s gentle, it’s kind and norishes.

Best product I’ve used

After having my children my skin took a turn for the worst I almost had acne all over my jaw,it was sore and really knocked my confidence.
After trying countless products I started using the secret weapon serum a few years ago which dramatically changed my skin for the better.
I now use the balm and the hyralronic serum together and I couldn’t recommend them more

It’s just amazing!

Been using this now for about 2yrs and I can honestly say I don’t think I could ever be without it. Nothing compares. It’s really helped even out my skin tone and I’m prone to dark patches. Love it!