Antioxidant Power Serum

206 Sold363 in stock

(12 customer reviews)


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  • 20% L ascorbic acid
  • 2% Niacinamide (B3)
  • 1%  Vitamin E
  • 1% Ferulic acid
  • 0.5% Pantothenic acid (B5)
  • Sodium Hyaluronate

This concentrated serum is a cocktail of powerful skin antioxidants. It is formulated with  20% L ascorbic acid, niacinamide, vitamin E, ferulic acid & sodium hyaluronate and is a powerhouse elixir of the finest calibre.

Ideal for: Anti-ageing, preventing UV & HEV (Blue light) radiation, preventing pollution damage, reducing skin pigmentation, improving skin hydration, intense collagen support, daily antioxidant.

Suitable for all skin types.

363 in stock

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Good to know

  • 20% L ascorbic acid (collagen support, antioxidant, anti-inflammatory, repairs photodamage)
  • 2% Niacinamide B3 (antioxidant, reduces pores, smooths skin)
  • 1 % Tocopherol (vitamin E – antioxidant)
  • 1% Ferulic acid (antioxidant, supports vitamin C & E antioxidant activity)
  • 0.5% Pantothenic acid B5 (anti-stress vitamin)

This potent antioxidant serum works like a shield to protect your skin from the ageing effects of environmental damage caused by UV radiation, pollution, toxins and chemicals in the environment.

Antioxidants work to neutralise free radicals in the skin. Free radicals are harmful and damaging electrically charged molecules that cause oxidisation of the cells. This is rather like biological rusting. We know that oxidisation accelerates skin ageing ~ using antioxidants daily considerably protects your skin cells from the damaging effects of free radicals. Antioxidants protect against the effects of UV exposure (sun), pollution, smog, city grime, chemicals, alcohol & smoking – all of which create free radical damage.

Our antioxidant serum combines four of the best scientifically proven skin antioxidants in the most active form ~ Vitamin C, Vitamin E, Vitamin B3 (niacinamide) and ferulic acid. It is a truly magnificent, high calibre formulation for anyone serious about skin health.

Suitable for all skin types

Vitamin C: Vitamin C is the most scientifically researched, proven and evaluated of all antioxidants. We use it in the L ascorbic acid form because studies show that this form of vitamin c is stable and able to penetrate deeply into the skin to disarm free radicals. We use it in a powerful 20% concentration to super charge your skin’s ability to fight oxidative damage. Vitamin C protects the skin from oxidative stress by sequentially donating electrons to neutralise free radicals.

Ferulic acid: is found naturally in the seeds of fruits as well as some vegetables, nuts, bran and grains. It is a potent antioxidant that fights free radicals reducing potential cellular damage. Ferulic acid helps stabilise the antioxidant actions of vitamin C & Vitamin E.

Vitamin E: is another well studied and powerful antioxidant. It occurs naturally in the skin but easily becomes depleted due to constant environmental exposure to the sun, pollution, infrared, smog etc. It works best with, and to enhance the effects of, Vitamin C.

Niacinamide (Vitamin B3): is an antioxidant, reduces pores, smooths the skin & helps improve the skin barrier function.

Sodium Hyaluronate: is a super skin hydrator due to its capacity as a humectant. This means it is able to hold up to 1000 times its weight in water. It also works as an antioxidant and a skin protector. It has been used in dermatology for many years to try skin dehydration.


Studies have shown that Vitamin C is equally effective against both UVB (290-320 nm) and UVA (320-400 nm) exposure.(Tracikovicj SS Arch Otolaryngol Head Neck Surg. Use of Topical ascorbic acid & its effects on photo damaged skin topography. 1999 Oct: 125(10):1091-8)

Studies have also shown that L ascorbic acid works well alone as an antioxidant & photoprotector, but works ever better in conjunction with Vitamin E. Studies show that Vitamin E potentiates the action of Vitamin C four-fold and that Vitamin C and Vitamin E together protect the hydrophilic and lipophilic compartments of the skin cell. What this means is that Vitamin C and Vitamin E used together synergistically limit chronic UV damage by significantly reducing both cell apoptosis and thymine dimer formation.

Studies have shown that a combination of at least 0.5% ferulic acid with L ascorbic acid 15% and tocopherol 1% increases the Vitamin C’s potency 8 fold. (Farris PK. Cosmetical Vitamins: Vitamin C. In: Draelos ZD, Dover JS, Alam M, editors. Cosmeceuticals & Procedures in Cosmetic Dermatology. 2nd ed. New York: Saunders Elsevier; 2009. pp. 51–6)


Use 3-7 drops on face, neck, décolleté & hands as required. AM 

Always replace the lid and keep out of direct sunlight to preserve the activity of the antioxidant.

Once opened this product will have a shelf life of 6 months. After that it will likely have oxidised and will no longer work effectively to protect & shield the skin.


Aqua (water), Ethoxydipropanediol, L Ascorbic acid, Propylene Glycol, Glycerin, Laureate 23, Tocopherol, Ferulic Acid, Panthenol, Triethanolamine, Sodium Hyaluronate, Sodium PCA, Niacinamide, Phenoxyethanol, Ethylhexylglycerin.

Delivery & Returns


All of our deliveries are shipped via Express Courier.


Express delivery (1-3 business days) £5.95 (order by 1pm)

We currently deliver to most European Countries.

Click here for more information.


Returning an order to Zenii is easy. We’re happy to offer a refund within 14 days of delivery – provided the items are unused, and in the original packaging.

Click here to read our online returns policy.

12 reviews for Antioxidant Power Serum

  1. Clare Rydqvist

    Lovely product to use alongside my other Zenii skincare products . This serum is fast absorbing and leaves a very subtle dewy look on first application which is lovely . Dries nicely and skin feels instantly rejuvenated.

  2. Haley

    I am a ZENii stockist and also use their products myself. Their Antioxidant Power serum is one of my favourites. I love the way it feels and it really helps to brighten my skin as well as protect it. I recommend it to everyone.

  3. gemmasnewman (verified owner)

    I absolutely love this product. It is such high quality and contains every important skingredient. Thank you so much Zenii!

  4. Zoe

    Again another really great product from Zenii. This is a gorgeous vitamin C serum that has caused no irritation to my skin whatsoever. It leaves my skin feeling so soft and bright too and hasn’t caused purging or any redness. It can be used 2 times a day as well which is great for me!. Sinks into skin upon application and no scent or stickiness either which is another plus!. It’s helping to fade away my pigmentation too.

  5. Gemma

    I absolutely love this serum! So lightweight and absorbs quickly, no sticky residue left on the skin like some serums can do. Use this everyday underneath my SPF. Packed full of the best antioxidants for my skin, 100% recommend this product!

  6. Lindsay Brown

    This is a wonderful product – it has really helped to control my breakouts.

  7. Lisa

    I use this alongside the ZENii spf day cream and it really feels like I’m giving my skin an extra bit of TLC. I love the fact that it protects again blue light radiation, I spend most of the working week staring at a screen so it’s good to know that this is helping to stave off any damage that could be happening to my skin. 10/10 ZENii!

  8. Vanessa Taylor

    Love love love… after applying this to my skin I know I’m protected all day from pollutants which would have a long lasting affect on my face. Im 41 now and need all the help I can get! Thanks ZENii for another amazing product!

  9. Lynda Wilde

    This antioxidant, anti-aging serum is my must have skin product. A little goes a long way so it lasts for absolutely ages. The serum absorbs quickly and immediately rehydrates my skin. I have sensitive skin and have not had any problems using the serum on a daily basis. Truly a 10 out of 10 serum

  10. Anna Porter

    Great serum. leave skin feeling glowing. Highly recommend x

  11. Anonymous

    I love that I don’t have to layer on different products – this contains everything I need in one bottle. Really great serum .

  12. Rebecca

    Obsessed with this serum!!!

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