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Medik8C-Tetra Advanced
Product Description
Unlock next-generation brightening and antioxidant defence with C-Tetra® Advanced, powered by 20% stabilised vitamin C and skin barrier science. Clinically proven to brighten skin and visibly reduce wrinkles in just 7 days* with 0% barrier disruption,* this high-strength serum delivers transformative results without compromising skin health.
Featuring restorative phyto exosomes for deep, controlled delivery and omni-antioxidant acetyl zingerone to neutralise ageing free radicals, C-Tetra® Advanced provides targeted, age-defying protection and a visibly smoother, more radiant complexion.
*Proven via independent clinical study conducted over 4 weeks on 32 participants.
KEY BENEFITS
Dramatic Skin Brightening
Clinically proven to visibly brighten and even skin tone in just 7 days, revealing a radiant, luminous complexion.*
Enhanced Skin Barrier Support
Phyto exosomes deliver key signalling molecules, including peptides and nutrients, to support the skin barrier with 0% barrier disruption.*
Defence Against Premature Ageing
Shields skin from free radicals, pollution, and daily environmental stressors to help prevent premature skin ageing.
Smoother, More Even Texture
Clinically proven to improve skin smoothness and texture in 7 days, leaving a soft, polished finish.*
Lightweight, Fast-Absorbing Feel
The gel-serum texture hydrates, smooths, and primes skin, leaving it instantly refreshed and ready for the day.
20% Stabilised Vitamin C (Tetrahexyldecyl Ascorbate)
A highly potent yet gentle form of vitamin C for dramatic skin brightening and powerful antioxidant protection against premature skin ageing.
Phyto Exosomes
Encapsulated by nature, our phyto exosomes intelligently deliver proteins, lipids, and messenger molecules to skin cells. Together, alongside our supercharged vitamin C, they help prevent & reduce premature skin ageing by supporting healthier-looking, more resilient skin.
Acetyl Zingerone (pronounced ‘a-sea-tul')
A super-antioxidant that works synergistically with vitamin C, enhancing its efficacy while neutralising ageing free radicals and shielding skin from environmental stressors.
Multi-Weight Hyaluronic Acid
Draws moisture into the skin to instantly plump and deeply hydrate for a soft, supple complexion.
KEY INGREDIENTS
20% Stabilised Vitamin C (Tetrahexyldecyl Ascorbate)
A highly potent yet gentle form of vitamin C for dramatic skin brightening and powerful antioxidant protection against premature skin ageing.
Phyto Exosomes
Encapsulated by nature, our phyto exosomes intelligently deliver proteins, lipids, and messenger molecules to skin cells. Together, alongside our supercharged vitamin C, they help prevent & reduce premature skin ageing by supporting healthier-looking, more resilient skin.
Acetyl Zingerone (pronounced ‘a-sea-tul')
A super-antioxidant that works synergistically with vitamin C, enhancing its efficacy while neutralising ageing free radicals and shielding skin from environmental stressors.
Multi-Weight Hyaluronic Acid
Draws moisture into the skin to instantly plump and deeply hydrate for a soft, supple complexion.
N-Acetyl Glucosamine (NAG)
A barrier-supporting, gentle, skin-refiner that smooths the look of pores, while helping to increase the skin's own natural hyaluronic acid levels over time.
7 days to visibly reduced wrinkles<1>
0% barrier disruption<1>
7 days to visibly smoother skin texture<1>
Reduces 90% of pollution damage to the skin's surface<2>
<1> Proven via independent clinical study conducted over 4 weeks on 32 participants.
<2> Proven via in vitro protein carbonylation data against particulate matter pollution on the stratum corneum and epidermis.
Featuring restorative phyto exosomes for deep, controlled delivery and omni-antioxidant acetyl zingerone to neutralise ageing free radicals, C-Tetra® Advanced provides targeted, age-defying protection and a visibly smoother, more radiant complexion.
*Proven via independent clinical study conducted over 4 weeks on 32 participants.
KEY BENEFITS
Dramatic Skin Brightening
Clinically proven to visibly brighten and even skin tone in just 7 days, revealing a radiant, luminous complexion.*
Enhanced Skin Barrier Support
Phyto exosomes deliver key signalling molecules, including peptides and nutrients, to support the skin barrier with 0% barrier disruption.*
Defence Against Premature Ageing
Shields skin from free radicals, pollution, and daily environmental stressors to help prevent premature skin ageing.
Smoother, More Even Texture
Clinically proven to improve skin smoothness and texture in 7 days, leaving a soft, polished finish.*
Lightweight, Fast-Absorbing Feel
The gel-serum texture hydrates, smooths, and primes skin, leaving it instantly refreshed and ready for the day.
20% Stabilised Vitamin C (Tetrahexyldecyl Ascorbate)
A highly potent yet gentle form of vitamin C for dramatic skin brightening and powerful antioxidant protection against premature skin ageing.
Phyto Exosomes
Encapsulated by nature, our phyto exosomes intelligently deliver proteins, lipids, and messenger molecules to skin cells. Together, alongside our supercharged vitamin C, they help prevent & reduce premature skin ageing by supporting healthier-looking, more resilient skin.
Acetyl Zingerone (pronounced ‘a-sea-tul')
A super-antioxidant that works synergistically with vitamin C, enhancing its efficacy while neutralising ageing free radicals and shielding skin from environmental stressors.
Multi-Weight Hyaluronic Acid
Draws moisture into the skin to instantly plump and deeply hydrate for a soft, supple complexion.
KEY INGREDIENTS
20% Stabilised Vitamin C (Tetrahexyldecyl Ascorbate)
A highly potent yet gentle form of vitamin C for dramatic skin brightening and powerful antioxidant protection against premature skin ageing.
Phyto Exosomes
Encapsulated by nature, our phyto exosomes intelligently deliver proteins, lipids, and messenger molecules to skin cells. Together, alongside our supercharged vitamin C, they help prevent & reduce premature skin ageing by supporting healthier-looking, more resilient skin.
Acetyl Zingerone (pronounced ‘a-sea-tul')
A super-antioxidant that works synergistically with vitamin C, enhancing its efficacy while neutralising ageing free radicals and shielding skin from environmental stressors.
Multi-Weight Hyaluronic Acid
Draws moisture into the skin to instantly plump and deeply hydrate for a soft, supple complexion.
N-Acetyl Glucosamine (NAG)
A barrier-supporting, gentle, skin-refiner that smooths the look of pores, while helping to increase the skin's own natural hyaluronic acid levels over time.
Directions
After cleansing in the morning, apply evenly across the face, neck & décolletage using upward strokes.
Test results
7 days to visibly brighter skin<1>7 days to visibly reduced wrinkles<1>
0% barrier disruption<1>
7 days to visibly smoother skin texture<1>
Reduces 90% of pollution damage to the skin's surface<2>
<1> Proven via independent clinical study conducted over 4 weeks on 32 participants.
<2> Proven via in vitro protein carbonylation data against particulate matter pollution on the stratum corneum and epidermis.
Ingredients
Aqua (Water), Tetrahexyldecyl Ascorbate, Isododecane, Propanediol, Acetyl Glucosamine, Squalane, Tocopherol, Acetyl Zingerone, Camellia Sinensis (Green Tea) Leaf Vesicles, Hydroxyacetophenone, Sodium Hyaluronate, Cellulose, Avena Sativa (Oat) Kernel Extract, Glycerin, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Citrus Grandis (Grapefruit) Peel Oil, Sucrose Stearate, Tetrasodium Glutamate Diacetate, Ethylhexylglycerin, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Xanthan Gum, Sodium Benzoate, Cellulose Gum, 1,2-Hexanediol, Polysorbate 60, Sorbitan Isostearate, Citric Acid, Phenoxyethanol, Citral, Linalool, Limonene.
This list of ingredients may be subject to change, please consult the packaging of the product purchased.
See more...
Rated 5 out of
5
by
Betty E. from
The best serum I’ve ever
[This review was collected as part of a promotion.] The best serum I’ve ever used. My hyperpigmentation has improved so much since using it
Date published: 2026-03-11
Rated 5 out of
5
by
Edyta S. from
One of my favourites
[This review was collected as part of a promotion.] It absorbs instantly leaving skin velvety and looking bright without any sticky residue. Skin feels smooth and comfortably hydrated. It has become one of my favourite products 😍
Date published: 2026-03-10
Rated 4 out of
5
by
Hornella D. from
Threw away by airport security
[This review was collected as part of a promotion.] Good product but I didn’t use it for long and the security airport agent threw it in the bin without me knowing. So, can’t really give a review as I’ve only used it a few times.
Date published: 2026-03-08
Rated 5 out of
5
by
Anna T. from
Lovely serum
[This review was collected as part of a promotion.] Smooth and easy to apply. Great smell and very effective, like all Medik8 products.
Date published: 2026-03-08
Rated 5 out of
5
by
Donna W. from
Love everything about this. .
[This review was collected as part of a promotion.] . . it has evened out my skin tone and I love the smell of it too. I feel naked if I don't apply this to my face.
It is non greasy, absorbs into my skin beautifully and leaves it soft and bouncu.
Really lovely product.
Date published: 2026-03-07
Rated 5 out of
5
by
SC R. from
Divine!
[This review was collected as part of a promotion.] I have tried many Vitamin C serums and creams. . . but hands down this is the best I have ever used. My skin looks so much brighter and nourished, and it just soaks into my skin so easily! Magic stuff.
Date published: 2026-03-06
Rated 5 out of
5
by
Maria from
Glow Boost in a Bottle – Love This Vitamin C!
I’ve been using C-Tetra® Advanced by Medik8 and it has become a staple in my routine. The texture is lightweight and silky, absorbs quickly, and layers perfectly under moisturizer and SPF.
Date published: 2026-03-03
Rated 5 out of
5
by
Margaret G. from
Game changer Vit C
My first experience with this new Vit C serum , I was used to the more oily Tetra luxe serum but needed something stronger. This serum is light but moisturising with a natural scent, it leaves a matte glow that lasts all day and my skin feels firmer , brighter and pesky age spots kept at bay the only skincare for me over 50
Date published: 2026-03-02
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