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Secret Weapon Hyaluronic Kakadu Serum


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Winner of Beauty Shortlist Editors Choice Award '23.

We are proud of the Hyaluronic Kakadu Serum, the strongest natural form of Vitamin C, which has outstanding multifunctional active ingredients for youthful, radiant skin, and induces outstanding results transforming the appearance of dull, tired and dehydrated skin. All are backed up by Clinical data.

Anti-ageing - Moisturising - Pro-Collagen 


The Kate McIver Secret Weapon Hyaluronic Kakadu Serum is packed with powerful ingredients, designed with low, medium and high molecular weight HA to provide intense hydration, improve skin elasticity and enhance your natural glow, achieving a youthful and radiant complexion.

Kakadu Plum is a super fruit native to Australia and is nature's powerhouse renowned for its exceptionally high vitamin C content. This vitamin C-rich extract helps brighten the complexion, even out skin tone, and reduce the appearance of dark spots and discoloration. It is a natural antioxidant, helping to neutralise free radicals that can lead to premature ageing.

Enriched with hyaluronic acid, known for its ability to attract and retain moisture in the skin, providing intense hydration helping plump and firm the skin, reducing the appearance of fine lines and wrinkles. Whether you're combating seasonal dryness or looking to replenish moisture levels, our serum provides long lasting hydration leaving your skin soft, smooth and refreshed.

Why is Kakadu Plum extract 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. Vitamin C makes the blood vessels' walls stronger and reduces the instances of micro-bleeding, thereby making your skin look less red and inflamed.

Splash your face with cold water, leaving your skin slightly damp. Gently smooth 5 drops of Kate McIver Secret Weapon Hyaluronic Kakadu Serum over your face and décolletage until it is fully absorbed. For best results, precede with Secret Weapon Cleansing Balm to fully clean and exfoliate your skin. Follow with your preferred Secret Weapon Serum to seal the hydration of the Secret Weapon Hyaluronic Serum.

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')



UK orders received by 12pm, Monday to Friday, will be dispatched the same day. Orders received after 12pm, at a weekend or on a Bank Holiday will be dispatched the following working day. Please find delivery timescales and prices in the table below:

European Union (EU)

Kate McIver Skin is registered for Import One-Stop Shop (IOSS), which means the correct amount of VAT for the destination (the buyer's) country will be collected at the point of sale and will be paid to the relevant EU Tax Authorities, by us, so there will be no additional or unexpected costs to you upon delivery.

IOSS is applicable for consignments not exceeding €150, inclusive of any shipping fee. If your order exceeds this amount, there may be additional shipping fees to pay. A member of our team will contact you on the details you provide at the point of sale to arrange this.

Shipping costs for each country within the EU can be found in the table below. We will share the shipping fees with you, based on your store spend:

EU shipping rates


Rest of World

For destinations outside of the UK and EU, our policy is to ship DDU (Delivery Duties Unpaid), therefore you may be subject to additional import duties and taxes, which are levied once the order reaches the specified destination. Any additional charges for customs clearance must be borne by you. Contact your local customs office for further information.

Please find shipping costs for other countries around the world in the table below:

Rest of world shipping rates


We hope that you love your Kate McIver Skin order, however, if for some reason you’re not satisfied, we offer a 30 day money back guarantee post your purchase date. If your skin were to react, it would be within this timeframe.

You must log any concerns via email to For the full T&Cs, please go to our Returns Policy.

Customer Reviews

Based on 90 reviews
B. Gases
Secret Weapon Hyaluronic Kakadu Serum

I love all products, my skin loves it,
Thank you so much


Great item

Jane Drummond

I am in love with this product, I usually use the original serum but ran out and in panic mode ordered this one and I’m so glad I did my skin looks and feels even better.

Alexandra King
Amazing stuff

I use both serums.. and I’ve stopped using them to try cheaper stuff just to save on the penny’s but I didn’t like anything but Kate serums.. when I run out of this stuff I go into a panic as my skin craves this so much.. I always make sure now I never leave it to late to reordered.. the best serums out there as I’ve tried them all, Kate is at the top for me always xx

Fiona Margaret Kirk
Secret Weapon Kakadu Serum

Absolutely love the Kate McIver range, use the Cleansing balm daily which is amazing and now using this serum too as there was no stick of the normal Secret Weapon Serum.
Have noticed a real difference in my skin and enjoy using the products so much. Thank you