Secret Weapon Serum - Limited Edition - Normal/Spot Prone


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The Secret Weapon Limited Edition Serum is an Award-Winning product developed to rehydrate, rejuvenate and support problematic skin. It is suitable for normal and oily skin, but not suggested for very sensitive skin.

With over 1,000 five star customer reviews sharing fantastic results, this is our best selling product. 

The Secret Weapon Limited Edition Serum is an Award-Winning product developed to rehydrate, rejuvenate and support problematic skin. It is suitable for normal and oily skin, but not suggested for very sensitive skin.

With over 1,000 five star customer reviews sharing fantastic results, this is our best selling product.

*Please be mindful that results will differ for each person as your skin is individual to you.

13 Natural Ingredients

The product contains high concentrations of vegan oils that when combined are affective and instantly absorbed when applied.

Kate wanted to develop a serum that targeted problematic skin having worked as a skin therapist for many years and witnessing so many people struggling with their confidence and mental health due to their skin battles. Kate was determined to help find and create a solution.

Argan Oil, Camellia Oil, Castor Seed Oil, Evening Primrose Oil, Frankincense, Jojoba Oil, Limonene, Sea Buckthorn Oil, Squalane, Rosehip Oil, Turmeric, Vitamin E Oil, Coconut Oil.

Argan Oil
Its unsaturated fatty acids help soften skin and by regulating sebum production, can help reduce further breakouts.

Camellia Oil
Natural anti-inflammatory and anti-microbial properties that help your skin recover without harsh chemicals and dryness.

Castor Seed Oil
Natural antibacterial properties help reduce acne causing bacteria. Its fatty acids help maintain good skin health.

Evening Primrose Oil
The gamma-linolenic acid (GLA) content helps to reduce skin inflammation and helps to bring your body's fatty acid ratio into balance. This can help treat cystic acne caused by infection deep underneath the skin or by fluctuating hormones.

Supports healthy and glowing skin and helps to repair it too! It dries out acne, reduces the appearance of fine lines and wrinkles and controls sebum production.

Jojoba Oil
Regulates sebum production, soothes and moisturises your skin without clogging pores.

Reduces damage, inflammation and rashes. Helps produce new cells and blood vessels and improves skin healing.

Sea Buckthorn Oil
Helpful for inflammatory skin conditions like eczema, rosacea and even acne. This cherished "super fruit" is rich in antioxidants which protect from free radicals that cause skin damage and cancer.

Hydrating and anti-ageing treating your skin at a cellular level due to its molecular structure being so close to your own skin's.

OilIts Vitamin A and linoleic acid content helps regulate sebum production reducing blackheads and whiteheads.

Contains curcumin, which is believed to inhibit pigmentation in the skin and can be effective in reducing the appearance of sun spots and pigmented scarring.

Vitamin E Oil - 5%
Fights off free radicals from the body, reducing wrinkles and keeps the skin youthful looking.

The Kate McIver Secret Weapon Limited Edition Serum fits into your daily skincare routine with ease.

For best results, it is recommended to cleanse your skin with the Kate McIver Secret Weapon Cleansing Balm, then apply the Kate McIver Secret Weapon Hyaluronic Kakadu Serum prior to using the Kate McIver Secret Weapon Limited Edition Serum.

To use the Secret Weapon Limited Edition Serum, apply a few drops to a cleansed face, massaging in until it is fully absorbed. If you're unsure, use a tissue to blot any excess away. A serum will not sit on the surface like moisturisers.

*Please note - if you have not used this product previously, we advise you to patch test the serum for 24 hours before use. To do this, apply a couple of drops behind the ear. If irritation occurs, discontinue using the product.

Skincare without Alcohol, Perfume and Parabens.

13 Natural Ingredients - Caprylic/Capric Triglyceride, Oenothera Biennis (Evening Primrose) Oil, Rosa Canina (Rosehip) Fruit Oil, Squalane, Simmondsia Chinensis (Jojoba) Seed Oil, Argania Spinosa (Argan) Kernel Oil, Camellia Oleifera (Camellia) Seed Oil, Hippophae Rhamnoides (Sea Buckthorn) Oil, Ricinus Communis (Castor) Seed Oil, Curcuma Longa (Turmeric) Root Oil, Tocopherol (Vitamin E), Boswellia Carterii (Frankincense) Oil, Limonene.



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:

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 887 reviews
Aleisha Swindell

Just couldn’t live without this serum now.. since being introduced by my facial has been so dry this winter and this serum is making my skin moisturised and supple for the winter.. which is made worse by several different acne treatments I currently use which dry out even further.I have suffered with adult acne last 3 years and every week Is different some weeks not so good but I have comments on how glowy and how clear my skin looks lately and I believe this serum has played a massive part in treating my skin.

Natasha Johnson
Finally something that works!

Growing up is hard anyway without worrying about your skin, my daughter who is 11 has struggled with her skin for over 12 months. We have tried the usual over the counter wipes, creams and cleansers, we even ordered a 3 step program from USA and then my friend told me about Kate McIver and bought my daughter a bottle of Secret Weapon Serum. what a game changer for my little girl, the redness has reduced and the breakouts have diminished and her confidence is returning. I cant recommend this serum enough and I have even started using myself on my chin with mask breakouts and it really helps! I would recommend this product to anyone who has tried and failed to get results.

Haffa Saleh
Amazing serum

When lockdown started I started getting many inflamed pimples which was uncommon for me. I later started to have scaring from constantly picking at the pimples. Eventually I searched for serums that would help remove Them from my face. After seeing amazing reviews of before and after pictures of other people I ended up getting one. And after consistent use and time within a couple of months I was able to see tremendous progress in my skin. Throughout my skincare I’ve only used 2-3 products. One being this serum and the other being the Paulas choice liquid exfoliant and moisturizer. The serum reduced the inflamed pimples and the exfoliant helped diminish the dark scaring of the pimples. These 3 products alone have transformed my skin. And now I feel very happy. Im looking forward to continue buying this serum because of how good it is. One thing I have to say for anyone who hasn’t bout this yet is to be patient and consistent. Don’t assume that things will change in a couple weeks, it takes months for things to change and from person to person it’s a different process. For some change might appear faster thane others. So keep using it because it will eventually pay off at the end.

Clare Cooper
Amazing product

I absolutely love the way this product makes my skin feel - it absorbs straight away unlike other products that I have used which tend to sit on the skin. I also love the cleansing balm and use both products regularly - I’m 51 and like to look after my skin

Love it

I’ve had the secret weapon serum limited addition for a year, after getting breakouts and nothing off the doctor worked I tried this and I noticed a difference within 3 weeks and my skin is now fully clear the bottle lasted me a year and just ordered my second x