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Medik8 C-Tetra & Medik8 C-Tetra Luxe Lipid Vitamin C Serums (30ML)

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Description

Description

Medik8 C-Tetra & Medik8 C-Tetra Luxe Vitamin C Serums

Revive your skin’s natural glow and fight visible signs of ageing with Medik8 C-Tetra and C-Tetra Luxe serums.

These advanced vitamin C serums harness the antioxidant power of vitamin C and E to hydrate, brighten and smooth the skin while defending against free radical damage for a youthful, radiant complexion.

Key Benefits

✅ Stimulates collagen and elastin production
✅ Minimises the appearance of fine lines and wrinkles
✅ Brightens and evens skin tone for a luminous complexion
✅ Nourishes and protects the skin’s natural barrier
✅ Hydrates and leaves skin soft, smooth, and glowing

Formulated for Every Skin Type

Medik8 C-Tetra
A lightweight, fast-absorbing 7% vitamin C serum designed for everyday use. Ideal for beginners and those with sensitive or youthful skin, C-Tetra delivers potent antioxidant protection without irritation.

  • Water-free, 100% stable formula – ensures long-lasting potency from the first drop to the last
  • Tetrahexyldecyl Ascorbate (vitamin C) – highly stable, lipid-soluble form of vitamin C that penetrates deeply for maximum results
  • Vitamin E – works synergistically with vitamin C to enhance antioxidant defence
  • Leaves skin visibly plump, smooth, and rejuvenated

Medik8 C-Tetra Luxe
For those looking to elevate their skincare routine, C-Tetra Luxe takes the original C-Tetra formula to the next level with 14% Vitamin C for added brightening and nourishing ingredients.

  • Maracuja Oil – rich in vitamin E and essential fatty acids to boost hydration and radiance
  • Vitamin F & Squalene – fortify the skin’s natural barrier, locking in moisture and shielding against environmental stressors
  • Red Ginseng – enhances the serum’s brightening effects, leaving skin luminous and evenly toned

How It Works

Your skin naturally contains antioxidants that protect against environmental free radicals. However, when free radicals overwhelm your skin’s defences, they cause damage that accelerates premature ageing.

Medik8 C-Tetra and C-Tetra Luxe serums are formulated with Tetrahexyldecyl Ascorbate, a powerful and stable form of vitamin C. This supercharged antioxidant not only neutralises free radicals but also stimulates collagen synthesis to reduce fine lines and promote a firmer, more youthful look.

Together with vitamin E, these serums form a “network antioxidant” system, offering enhanced protection and a healthy, glowing complexion throughout the day.

 

Why Choose Medik8 C-Tetra Serums?

  • Advanced formulas for daily radiance and long-term skin health
  • Perfect for all skin types, including sensitive skin
  • Non-irritating, lightweight, and easy to layer under moisturiser or sunscreen
  • Scientifically backed, dermatologist-recommended

Restore your skin’s youthful glow and shield against environmental stress with Medik8 C-Tetra and C-Tetra Luxe – the ultimate vitamin C serums for healthy, radiant skin.

 

What’s the Difference Between Medik8 C-Tetra & C-Tetra Luxe?

Both serums contain stable vitamin C (Tetrahexyldecyl Ascorbate) and vitamin E to brighten skin and reduce signs of ageing, but they’re designed for slightly different needs:

Medik8 C-Tetra  – 7% Vitamin C

  • Lightweight and fast-absorbing – perfect for those who prefer a simple, non-greasy serum
  • Basic nourishing formula focused on antioxidant protection and collagen support
  • Ideal for beginners, younger skin, or sensitive skin
  • Key focus: hydrating, brightening, and protecting against free radicals

Medik8 C-Tetra Luxe – 14% Vitamin C

  • Richer, more luxurious texture for those who want extra hydration
  • Enhanced with additional brightening and nourishing ingredients:
    • Maracuja Oil – rich in vitamin E and essential fatty acids for added hydration and radiance
    • Vitamin F & Squalene – strengthen and protect the skin barrier
    • Red Ginseng Extract – boosts brightening power for a luminous, even complexion
  • Perfect for dry, mature, or dull skin that needs extra glow and rejuvenation
  • Key focus: deep hydration, intensive brightening, and skin radiance

Targeted Care for the Delicate Eye Area

Medik8 C-Tetra Eye – a gentle vitamin C serum specially formulated for the delicate skin around the eyes. It brightens dark circles, smooths fine lines and refreshes tired eyes for a wide-awake look.

In Short:

  • C-Tetra – A simpler, lightweight serum for daily brightening and antioxidant protection
  • C-Tetra Luxe – A richer, more intensive formula for deeper hydration and luminosity
  • Medik8 C-Tetra Eye – Specifically for around the eye area

Select from the options below

Medik8 Range of Vitamin C Serums include;

Super C Ferulic – potent 30% Vitamin C Serum

Pure C15 – 15% L-ascorbic acid form of Vitamin C with enhanced brightening action

 

Look through our extensive selection of Vitamin C Serums here;

CE Ferulic  – for mature, sensitive, dry & post treatment skin

Phloretin CF  – for combination or pigmentation prone skin

Silymarin CF – for oily, congested, blackhead-prone skin

More Info

Additional information

C-Tetra Serums

C-Tetra, C-Tetra Luxe, C-Tetra Eye Serum

Product Ingredients

Product Ingredients

C-TETRA®  Lipid Vitamin C Radiance Serum

Simmondsia Chinensis (Jojoba) Seed Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Citrus Grandis (Grapefruit) Peel Oil, Tocopheryl Acetate, PPG-12/SMDI Copolymer, Limonene, Citral, Linalool, Geraniol. C-Tetra® Intense Squalane, Simmondsia Chinensis (Jojoba) Seed Oil, Tetrahexyldecyl Ascorbate, Dimethicone, Candida Bombicola/Glucose/Methyl Rapeseedate Ferment, Citrus Grandis (Grapefruit) Peel Oil, Ethyl Linoleate, Passiflora Edulis (Maracuja) Seed Oil, Tocopheryl Acetate, Panax Ginseng Root Oil, Olea Europaea (Olive) Fruit Oil, Helianthus Annuus (Sunflower) Seed Oil, Prunus Armeniaca (Apricot) Kernel Oil, Prunus Amygdalus Dulcis (Sweet Almond) Oil, PPG-12/SMDI Copolymer, Limonene.

*Although we try our best to ensure this list of ingredients is accurate there may be product upgrades from time to time, or slight variants between different regions based on local laws, meaning the only definitive ingredient list is that which is printed on the product packaging

Ingredients

Tetrahexyldecyl Ascorbate – A lipid-soluble form of vitamin C that provides exceptional antioxidant protection from harmful free radicals, while stimulating collagen production for a youthful complexion.

Vitamin E  – A lipid-soluble antioxidant that is naturally present in the skin. Vitamin E protects the skin from free radicals and is regenerated by vitamin C for optimum power.

KEY INGREDIENTS IN C-TETRA INTENSE

Maracuja Oil     Naturally rich in nutrients, maracuja oil nourishes the complexion with fatty acids and provides an antioxidant protective shield.

Vitamin F   Otherwise known as ethyl linoleate or linoleic acid, vitamin F is an omega-6 essential fatty acid which deeply nourishes and hydrates the complexion.

Tetrahexyldecyl Ascorbate – A lipid-soluble form of vitamin C that provides exceptional antioxidant protection from harmful free radicals, while stimulating collagen production.

Maracuja Oil – Rich in nutrients, nourishes the complexion with fatty acids and provides an antioxidant protective shield

Vitamin F – Vitamin F is an omega-6 essential fatty acid which deeply nourishes and hydrates the complexion

Optimised Red Ginseng –This natural extract boosts the serum’s brightening powers while stimulating collagen production

Vitamin E – Vitamin E protects the skin from free radicals and is regenerated by vitamin C for optimum power

Squalane – A natural emollient; squalane helps to restore the skin’s natural defensive barrier while deeply hydrating the skin

How to Use

How to Use

How To Use

After cleansing in the morning, massage 4 drops across the face, neck and décolletage

Leave to absorb before applying moisturiser.

Ordering & Returns Policy
ORDERING & RETURNS POLICY
Delivery costs are included for UK addresses only - additional costs will be chargeable for delivery outside the UK Delivery via Royalmail “Tracked 48” service – You will receive email and text delivery notifications from RoyalMail once we process your order - please ensure you provide accurate information when placing your order as those details generate your delivery and tracking informationWe will not be held responsible for loss of parcels as a result of inaccurate or incomplete delivery address information provided by you at the time of ordering.Additional postage fees will be incurred for delivery outside of the UK – we will contact you & quote the additional postage costs;
Refunds & Cancellations
You have the right to cancel your order and return products unused, unopened (product seals must be intact) and in their original undamaged packaging within 14 days of placing your orderPlease Note: If you decide to cancel your order after you’ve made your PayPal transaction but before we have despatched the products we will honour your cancellation and refund in full less the non-refundable Paypal transaction fees which PayPal deduct from your payment currently 3.4% of the payment you've made.If you cancel your order after we’ve despatched your products we'll refund your order, less postage fee of £3.99, less the non-refundable PayPal fees which are currently 3.4% of the payment you’ve made when we receive the returned products which must be unopened, seals intact, unused and in all original packagingPlease email us on therapy@dianenivern.com or call 01617961169 (Monday to Saturday) if you wish to cancel your order and return it -You will be responsible for the costs of returning the product you wish to returnIf you have a complaint regarding the product or experience an allergic reaction to the product please call us on 01617961169 or email therapy@dianenivern.com Please bear in mind that our skincare products are cosmeceutical grade – not cosmetic – they have “active” ingredients. Some degree of “downtime”, mild irritation, dryness or flakiness may be experienced and should not be considered as an “allergic reaction” – Please contact us for guidance before returning your productIn the event of an allergic reaction there must be no more than 10% of product used to be refunded. You must be willing to provide details and photographic evidence of the issue as we are obliged to report skin reactions to the product’s manufacturer
Ship your item back to Us
Returns address: 406 Bury New Road, Whitefield Manchester, M45 7SX, UK Please remember to ensure that the item you are returning is repackaged with all original elements.

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