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Making skin care simple, Medik8 takes the fuss out of caring for your complexion. Powered by three key ingredients: vitamin C, vitamin A and non-negotiable SPF, the brand's signature skin care saviours are famed for their potent potions. Discover the C-Tetra Serum (30ml), the brand's introductory vitamin C treatment that delivers a brighter, more even complexion.
Are you looking for the perfect entry point to vitamin C? Cue the C-Tetra Serum (30ml) from Medik8.
Formulated with tetrahexyldecyl ascorbate (AKA stabilised vitamin C) at a 7% potency, this stabilised vitamin C serum (which is suitable for sensitive skin) works to brighten uneven skin tone while reducing the appearance of dark spots, fine lines and wrinkles. Infused with antioxidant-rich vitamin E, it protects against free radical damage while nourishing jojoba seed oil delivers a super soft, comforting feel. The result? A healthy-looking complexion in no time.
Simmondsia Chinensis (Jojoba) Seed Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Citrus Grandis (Grapefruit) Peel Oil, Tocopheryl Acetate, PPG-12/SMDI Copolymer, Limonene, Citral, Linalool, Geraniol.
For the latest information, it is recommended to review the ingredient list printed on the packaging of the product prior to usage or consumption.
After cleansing in the morning, massage four drops across the face, neck and décolletage. Leave to absorb before applying sunscreen.
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Medik8 C-Tetra Serum 30ml
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Customer Reviews
5 stars rating 130 reviews
4 stars rating 20 reviews
3 stars rating 9 reviews
2 stars rating 4 reviews
1 stars rating 2 reviews
Top Customer Reviews
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Best Vit C so far !
I used vit C from Paula's choice and sunday riley but nothing works well as Medik 8, it's so lightweight, fast absorb and smell amazing like a fresh orange, I use this one every morning along with sunscreen ♥ï¸I have super sensitive and acne prone during period time so it's very hard for me to choose perfect products which wont make my skin breakout or cause redness. I decided to go for full combo of Medik8 few months ago and Im so happy with that choice, my skin is visible improved, brighter and softerHighly recommend Medik 8 !
by kat
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Don't like the consistency
It's okay, nothing special to say about this product. It didn't do anything to my skin, neither negative nor positive. I don't like the texture, it's too greasy and too liquidy. I definitely won't repurchase it even thought the price is acceptable.
by Antonija
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So hydrating
I love this. I used a lot of vitamin c products and this one I think is my favourite. Wasn’t sure of the consistency at first (it’s like water), but it feels like it’s doing good stuff to my skin and definitely looks brighter. Only been using for 2 weeks so I’m sure I’ll continue to see improvementÂ
by Hannah
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Luxurious
Got this in the Cult Beauty advent calendar and now I'm a convert for life. This serum/oil is lush. Texture is unusual and goes on like a dream, can use with other skincare and under make up and my skin looks and feels glowing. I absolutely love it.
by Wendy
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Glowing skin
I received a sample bottle of this serum and was so impressed by the results that I have just purchased my first bottle. Using this serum feels like you’re really looking after your skin. The texture is not really oily but feels luxurious and hydrating. It takes several minutes to sink in but you can apply eye cream, or moisturise your body whilst waiting. The scent of this serum is a beautiful and uplifting citrus, which adds to the whole enjoyment of the ritual of applying this product. Ultimately though, this serum is really effective - my skin feels hydrated, smooth and glowy after using it. My skin has been prone to break outs in the past, but this serum does not trigger any of that. In fact my skin has never looked clearer or more healthy!Â
by I love cosmetics
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Beautiful
Such a Beautiful Vitamin C Serum. The texture and smell are amazing. It suited my skin straight away and glides under my moisturizer and makeup without flaking.  Gives me a glow and clarity to my skin  I Will repurchase for sure. I am very pleased with this great productÂ
by Lana
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Satisfied customer
This is my second purchase of this product. It is suitable for my sensitive skin and has increased brightness and reduced pigmentation. Also impressed with cult beauty service and price.
by Kate
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Ideal vitamin C serum
Oily texture which sinks right in, lovely citrus smell and my skin feels amazing and looks smooth and shiny. I got this serum as a sample in one of the goody bags and I bought the full size and most probably will repurchase.
by Markéta
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Won't repurchase
Not sure that this really did anything for me. I've since moved on to another brand and didn't finish this bottle. Â A nice product, but didn't feel that it was really working for me sadly.
by Lucy
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What is this sorcery?
The texture, the consistency, the smell, the finish...everything is just right. I've managed to balance my hormonal skin so it was time to bring back in a Vit C and boy am i glad it was t his one. Super lightweight, feels like an oil but absorbs like a serum. I've been using for around a month i've noticed a difference is he overall tone/balance of my skin. I have some gnarly post blemish marks on my cheeks and i'm definitely seeing a slight fade/improvement. I don't have particularly sensitive skin (combo queen) but appreciate when products don't tingle/cause any sensation yet just work. A little goes a long way and i can't wait to see the results as i continue to use.
by Jodi TD - Cult Beauty Staff
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