Medik8 C-Tetra

Name: Medik8 C-Tetra
Brand: Medik8
SKU: MDR1028
Price: 68.8 AUD
Availability: InStock
Rating: 4.8 (87 reviews)

Best for: ageing, all skin types, dullness

Rated 4.8 out of 5

Based on 87 reviews

Earn up to points with this purchase!

Restore radiance and fight visible signs of ageing with Medik8 C-Tetra, a super-light daily vitamin C serum. Utilising the antioxidant...Read more

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Antioxidant

Minimise Wrinkles

Skin Brightening

Strengthens Skin

Use in: AM

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Medik8 C-Tetra Advanced 4ml

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Full Description

Restore radiance and fight visible signs of ageing with Medik8 C-Tetra, a super-light daily vitamin C serum. Utilising the antioxidant power of vitamin C and E, the hydrating serum brightens and smooths the complexion, while fighting free radicals to reduce visible signs of ageing.

Formulated with nourishing, pampering oils combined with the anti-ageing power of vitamin C, this fast-absorbing vitamin C serum is ideal for those looking for skin rejuvenation. Perfect for those who are new to vitamin C.

C-Tetra Luxe - Harnessing the power of C-Tetra, C-Tetra Luxe is boosted with additional brightening and nourishing ingredients, listed below.

How It Works

Your skin is packed full of natural antioxidants that defend against free radicals from the environment. When these environmental free radicals outweigh your skin’s antioxidants, the skin can no longer protect itself. Free radicals latch onto the defenceless skin cells, causing irreparable damage, which ultimately leads to premature ageing. C-Tetra contains tetrahexyldecyl ascorbate, a super-stable form of vitamin C that boosts the antioxidant defence levels in the skin. Ever the multi-tasker, it also stimulates collagen production to reduce the appearance of fine lines and wrinkles, leaving the complexion plump, radiant and youthful looking. As a lipid-soluble form of vitamin C, it is able to penetrate the skin’s defensive lipid barrier with ease; delivering benefits deep within the skin. Vitamin C and vitamin E work together synergistically as 'network antioxidants', boosting the serum’s overall antioxidant effect to keep skin protected throughout the day.

Ingredients

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

Shipping & Returns

FREE for orders $49+ via Australia Post e-Parcel ground.

Express Air add $4.95.

Same Day Dispatch by 4pm M-F (Sydney Business Days)

Returns

If it's not right and you haven't opened it yet, you are welcome to Return It within 30 days. Reach out to our team to for authorisation prior to returning to us in original sealed condition.

Already opened or used the product? Thats ok reach out to us first and we can discuss your options as each brand is different. We can help you understand if a return is possible.

We unfortunately can not accept returns without return authorisation prior to sending to us.

Our Skin Expert Talks About Medik8 C-Tetra

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average rating 4.8 out of 5

Based on 87 reviews

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87 Reviews

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Reviewed by Lee M.

Verified Buyer

I recommend this product

Rated 5 out of 5

Review posted

Great product

This is a great vitamin c serum, but I’ve found something even better, so I won’t be repurchasing.

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Skinmart

Hi Lee,

Thank you for taking the time to share your thoughts on the Medik8 C-Tetra. We’re glad to hear you found it to be a great vitamin C serum, even though you’ve now discovered another product that you feel works better for your skin.

Reviewed by Elisa K.

Verified Buyer

I recommend this product

Rated 5 out of 5

Review posted

Great C-Vitamin serum

Love this serum - doesn't break me out. Great results with glowing and even skin. Lasts forever!

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Reviewed by Leah M.

Verified Buyer

Rated 3 out of 5

Review posted

Not for me

This MAY give good results but I'm not enjoying the formula, it says 6 drops but 6 drops doesn't spread on me and if I use more I get irritation. Maybe more suitable to oily skin types? I have dry sensitive skin (also hated the Skincuticles so maybe C serums just aren't for me).

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Skinmart

Hi Leah,

Thank you for taking the time to share your experience with Medik8 C-Tetra. We really appreciate your honest feedback.

It’s true that while C-Tetra is a well-loved vitamin C serum, its lightweight, oil-based formula can sometimes feel a bit underwhelming on drier or more sensitive skin types—especially if you're expecting a more hydrating or cushiony feel. Also, as you've noted, using more than the recommended 6 drops can increase the risk of irritation, particularly if your skin is already sensitised.

Since you've also found Skinceuticals' vitamin C difficult to tolerate, it's possible your skin may be reacting to ascorbic acid (or certain delivery systems), which can be too active for some skin types—especially dry or reactive skin.

If you’re still interested in the brightening and antioxidant benefits of vitamin C but want something more soothing and hydrating, we’d love to help you explore alternatives that are formulated for dry and sensitive skin—such as:

A gentler vitamin C derivative, like magnesium ascorbyl phosphate

A water-based serum that offers more hydration and less intensity

Or pairing your routine with a barrier-repair moisturiser to help reduce irritation

Let us know if you’d like personalised support choosing a better match—we’re here to help ensure your skincare works with, not against, your skin’s needs.

Reviewed by Katrina R.

Verified Buyer

I recommend this product

Rated 5 out of 5

Review posted

The glow is real

I can't live without the Medik8 C-Tetra, i have been using this religiously for a couple of years now. Its light weight and absorbs quickly into the skin, leaving a radiant glow for the day. I love this product.

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