C-Tetra® Advanced

Name: C-Tetra® Advanced
Brand: Medik8
Price: 85.00 EUR
Availability: InStock

€85,00

20% Vitamin C Gel-Serum with Phyto-Exosomes - 30 ml

Defend your skin against premature aging and achieve accelerated skin brightening with an advanced combination of 20% Vitamin C and skin barrier science.

Clinically proven to brighten skin and visibly reduce wrinkles in just 7 days, with 0% disruption to the skin barrier.
C-Tetra Advanced is designed for powerful, visible brightening, skin softening and daily antioxidant protection.

This clever ingredient complex combines stabilized 20% vitamin C with restorative phyto-exosomes for deep, controlled delivery, along with the omni-antioxidant acetyl zingerone, which neutralizes the aging effects of free radicals.

The result? A high-performance, skin-rejuvenating vitamin C serum that works smarter—not more aggressively.

Clinically proven	No artificial fragrances
Dermatologically tested	Proven mild formula
Certified by the Vegan Society	Tested on all skin types and tones
Non-comedogenic

20% Stabilized Vitamin C (Tetrahexyldecyl Ascorbate)
A very powerful yet gentle form of vitamin C for intensive skin brightening and strong antioxidant protection against premature skin aging.

Phyto-exosomes
Encapsulated by nature, our phyto-exosomes intelligently deliver proteins, lipids, and signaling molecules to skin cells. Combined with our powerful vitamin C, they help prevent and reduce premature skin aging by making skin more resilient and healthy.

Acetyl Zingerone (pronounced 'a-sie-tul')
A super antioxidant that works synergistically with vitamin C, amplifying its effects while neutralizing aging free radicals and protecting skin from environmental stressors.

Multi-weight Hyaluronic Acid
Attracts moisture into the skin to instantly plump and intensely hydrate for a soft, supple complexion.

N-Acetyl Glucosamine (NAG)
A skin-soothing ingredient that supports the skin barrier, refines pores and stimulates the skin's natural production of hyaluronic acid in the long term.

Aqua (Water), Tetrahexyldecyl Ascorbate, Isododecane, Propanediol, Acetylglucosamine, Squalane, Tocopherol, Acetylzingerone, Camellia Sinensis (Green Tea) Leaf Leaf Extract, 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.)

*While we make every effort to ensure the accuracy of this ingredient list, product upgrades or slight variations between regions may occur from time to time based on local regulations. This means the only definitive ingredient list is the one found on the product packaging.

Apply as part of your morning routine. Massage 2-3 pumps over your face, neck, and décolleté. Follow with moisturizer and always finish with sunscreen.

What strength of vitamin C does C-Tetra Advanced contain?
C-Tetra Advanced contains 20% stabilized vitamin C (tetrahexyldecyl ascorbate).

Can I use C-Tetra Advanced together with Crystal Retinal (vitamin A)?
Absolutely. We even recommend this as part of our groundbreaking CSA philosophy®, which combines vitamin C and sunscreen during the day and vitamin A in the evening. This is the simple secret to radiant, youthful-looking skin.

Can I use C-Tetra Advanced during pregnancy or breastfeeding?
As a cosmetic company, we are not permitted to provide medical advice for situations such as pregnancy or breastfeeding. We strongly recommend discussing the ingredients with your doctor or midwife before use. General advice: This product does not contain any ingredients that we advise against during pregnancy, unless advised by your doctor.

Can I combine C-Tetra Advanced with Liquid Peptides Advanced MP in the morning?
Yes, that's possible. Since both C-Tetra Advanced and Liquid Peptides Advanced MP are emulsions, you can easily layer them. If you're using multiple serums, apply them from thinnest to thickest.

Does C-Tetra Advanced contain fragrances or essential oils?
C-Tetra Advanced is free from artificial fragrances but contains a natural, uplifting citrus scent derived from essential oils. The scent is refreshing and designed to give your skincare routine an energetic start. If you're familiar with our C-Tetra or C-Tetra Luxe serums, you'll recognize the scent.

When should I incorporate C-Tetra Advanced into my routine?
Apply C-Tetra Advanced in the morning after cleansing and toning, but before your moisturizer and sunscreen. If you're using multiple serums, adjust the order based on texture—from thinnest to thickest. Since C-Tetra Advanced is an emulsion, apply it after water- and oil-based serums.

Can I use C-Tetra Advanced if I have never used vitamin C before?
Absolutely. Despite its powerful 20% vitamin C concentration, C-Tetra Advanced is formulated with a very gentle form of vitamin C: THDA (Tetrahexyldecyl Ascorbate), suitable for all skin types – even beginners. It also contains soothing active ingredients like phyto-exosomes that support the skin barrier. Independent clinical and consumer tests have proven the product's gentleness on all skin types. So you can enjoy C-Tetra Advanced with peace of mind, without worrying about irritation.

I think there's still product in my bottle that I can't reach with the pump. What should I do?
C-Tetra Advanced is a light emulsion and slightly thicker than watery serums, making it flow more slowly. The pump is designed to dispense the product accurately. If any residue remains, you can unscrew the pump and hold the bottle upside down to pour out the last bit. This is usually only necessary when the product is almost empty.

Traditional serums with a high vitamin C content can break down before reaching the skin or cause irritation. C-Tetra Advanced is carefully formulated with a stabilized 20% vitamin C complex, guaranteeing long-lasting effectiveness – from the first drop to the last.

Phyto-exosomes, derived from green tea leaves and encapsulated by nature, are rich in proteins, lipids, and signaling molecules. As smart microcarriers, they transport vital signals like peptides and nutrients to skin cells, strengthening the skin barrier for optimal skin tolerance and comfort.

Fortified with the omni-antioxidant acetyl zingerone, this advanced formula helps protect skin from pollution-induced damage. It neutralizes free radicals, blocks harmful pollution particles, and strengthens the skin's natural defenses – for a more resilient complexion.

Traditional serums with a high vitamin C concentration can break down before reaching the skin or cause irritation. C-Tetra Advanced is carefully formulated with a stabilized 20% vitamin C complex, ensuring long-lasting effectiveness – from the first drop to the last.

Phyto-exosomes, derived from green tea leaves and encapsulated by nature, are rich in proteins, lipids, and signaling molecules. As intelligent microcarriers, they transport essential signals—such as peptides and nutrients—to skin cells, strengthening the skin barrier and thus supporting optimal skin tolerance and comfort.

Further enriched with the omni-antioxidant acetyl zingerone, this advanced formula helps protect skin from pollution damage. It neutralizes free radicals, blocks harmful pollution particles, and strengthens the skin's natural defenses – for a more resilient complexion.

“C-Tetra Advanced combines the potent power of vitamin C with barrier-supporting phyto exosomes alongside super antioxidant acetyl zingerone, to protect against premature skin aging. C-Tetra Advanced is scientifically proven to shield against the environmental stressors that cause premature skin aging, reducing damage by up to 78%.”

Daniel Isaacs, Chief Product Officer & Founding Partner Of Medik8