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Secret Weapon Serum - 15ml Limited Edition


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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.

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


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:

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 124 reviews
Hillary D
Highly highly recommended.

Had started to use the original serum prior to a rediagnosis and starting chemotherapy and had seen a difference. Have moved to the limited edition since starting chemo last year and this has been a godsend helping keep my skin clear, hydrated and plump. You really can see and feel the difference - if you haven’t tried these products yet, you really need to - worth every penny. Got the candle and cleansing balm which doubles as a face mask at Christmas and both are just as good and I’m equally impressed. I’ve followed Kate’s story since 2017, God bless you Kate.

Caroline Locke
Amazing oil

Beautiful cleansing balm and gorgeous oil that sinks in so effortlessly and leaves the skin feeling moisturised and glowing


I am going through chemotherapy and read about the Original serum in an article in You magazine. Am never sure whether to believe the hype with mag reviews, but I bit the bullet and am so glad I did. Within 2 weeks my skin is smoother and pores less visible, something I have been hankering after for years. Have now also bought the cleansing balm and am equally impressed. Despite being drawn to the products due to their kindness to skin going through cancer treatment, I shall be continuing to use these beyond my treatment and am recommending them to everyone. Thank you for a much needed wellbeing boost xxx

Michelle Beckett
Secret weapon limited edition

Wow this is just amazing 🤩 I absolutely love this stuff I bought the cleanser to used it and felt the difference within 2 days of my purchase I am going through the menopause and my skin is so dry and bitty full of acne well Thankyou katemciver not no more please do not hesitate to buy this magical serum it’s my life saver 🙏❤️

Fern Blackwood

I have had lots of break outs recently and invested in this problem, breakout is definitely starting to clear and somebody told me that my skin was growing this morning!!! Definitely does what it says on the bottle!!!!