Medik8 C-Tetra

Medik8 Authentic
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Medik8 C-Tetra by Medik8

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Medik8 C-Tetra is a revolutionary ultra-stable vitamin C serum which helps combat sun-induced damage to the skin, trigger collagen synthesis, increase the skins elasticity and density as well as improve the skins texture and brighten the complexion.

The Medik8 C-Tetra has been designed for both men and women in their mid-20s to 40s.

Regular vitamin C is very unstable and many typical vitamin C products are inactive by the time they are used on the skin, in some cases, they have become pro-oxidant and actually generate free radicals! Ground-breaking stability data on C-Tetra guarantees real vitamin C activity and best of all, unlike L-ascorbic acid (regular vitamin C), C-Tetra will not exfoliate or irritate skin.

C-Tetra contains 3% Tetrahexyldecyl Ascorbate, the most potent and highly stable derivative of vitamin C available.

C-Tetra has been shown to have up to 4 times the potency L-ascorbic acid and other derivatives such as MAP (magnesium ascorbyl phosphate).


Simmondsia Chinensis Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Tocopherol (d-Alpha)


C-Tetra has been formulated for direct application to the face.

In the morning, after cleansing, apply 3-4 drops directly to the skin and blend evenly across the whole facial area, neck and decollete. Alternatively, place a drop on your finger and massage into the skin. Leave to absorb for 2-3 minutes.

Follow with the application of Hydr8 SPF25 or your preferred SPF hydrator/sunscreen.

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FREE standard shipping within Australia!

Same day Melbourne delivery to select post codes.

Express Post - $6.95 per order

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Reviews (6)
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Good product from an excellent company - 20-05-2013 by

I really like the lack of packaging from Medik8. I was pleased with the information about each product on their website, as well as their stance on all things 'chemical' and environmental. I find that the serum is absorbed into my skin very quickly and I have only a short period to blend it over the rest of my face - not sure what that says about my face, but there does seem to be a specific method of application that works (direct onto skin and then blend quickly). I do think the texture of my skin has improved though I can't see anything significant for brightness.

Beautiful product!! - 20-06-2013 by

Although this serum seems expensive, it does go a long way and feels amazing on your skin. I only need 4 small drops and that covers my whole face & neck. I use it once a day (in the morning) and love it!

Evens skin tone - 14-09-2013 by

I love this serum I use it in the morning after cleansing and it it so moisturising and hydrating
I have found this has definitely evened out my skin tone. Another bonus it smells amazing!

Awesome product! - 27-09-2014 by

The serum is easily absorbed, gives a youthful glow & brightness to the skin. I feel like it has been quite healing also

Amazing product - 31-08-2014 by

The Vitamin C serum is the most beautiful, nourishing serum I've found. It's healing properties are really quite remarkable and it smells good enough to eat! With sensitive, combination skin I found this serum did not encourage more oil, merely adapted to my skin type and I couldn't be happier with my purchase! Thank you, Adore Beauty and Medik8! Xxx

Will repurchase over and over! - 20-02-2014 by

Not only does a little bit go a long way, but I am seeing results after only 3 weeks of using this! I've been putting it on in the mornings after I use my SK-II Facial Treatment Essence and my gods, my skin already seems to be more even in tone and smoother!

I find three drops covers my whole face and neck (I like to use a little bit more to cover whatever parts of my decollete are showing).

For a vitamin C serum this is really not drying or uncomfortable - actually if anything my skin feels more hydrated once I've used it, and certainly a lot smoother. Plus, it smells really nice - like a very natural citrus scent. Lovely!

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