Medik8 C-Tetra Advanced Serum 30ml

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Medik8 C‑Tetra Advanced is a high-performance 20 % vitamin C gel-serum with phyto exosomes, formulated to deliver intense brightening, smoothness, and antioxidant protection—without compromising skin barrier health. With dramatic brightening results in as little as seven days, your skin will appear younger and fresher. Powerful antioxidants fight free radicals, strengthening the skin's natural barrier, while hyaluronic acid and glucosamine hydrate and plump for a firmer, more supple skin feel.

C‑Tetra Advanced for oily skin is lightweight, non-greasy and glides on effortlessly, absorbing rapidly and preparing the skin for day-time protection—ideal for those transitioning from richer serums but wanting enhanced efficacy

Major Benefits of Medik8 C‑Tetra Advanced Serum

Dramatic brightening in just 7 days thanks to 20 % tetrahexyldecyl ascorbate, a stabilised form of vitamin C
Skin barrier support via phyto exosomes to minimise irritation and increase resilience.
Powerful antioxidant protection from acetyl zingerone—fighting free radicals and pollution.
Hydration and plumping through multi-weight hyaluronic acid and N‑acetyl glucosamine (NAG).
Lightweight gel texture, perfect for oily or combination skin types and layering under SPF or makeup.

How to use Medik8 C‑Tetra Advanced Serum

Use in the morning, after cleansing and toning.
Dispense 2–3 pumps of the gel-serum onto your hand.
Massage gently across the face, neck, and décolletage.
Follow with a moisturiser and always apply SPF, which is essential for protection against the sun and the elements.
Layer serums from thinnest to thickest; apply C‑Tetra Advanced after water/oil‑based serums
Use alongside Medik8 Crystal Retinal at night for enhanced results (retinol by night, vitamin C + SPF by day)

What's inside? Key Ingredients of Medik8 C‑Tetra Advanced Serum

20 % Tetrahexyldecyl Ascorbate—stabilised lipid-soluble vitamin C for brightening and collagen support
Phyto Exosomes—lipid-encapsulated botanicals enhancing delivery and barrier repair
Acetyl Zingerone—a 'super-antioxidant' that boosts C's protection power
Multi-weight Hyaluronic Acid—for hydration and bounce
N‑Acetyl Glucosamine (NAG)—refines texture, reduces pores, supports natural HA

Medik8 C‑Tetra Advanced Serum FAQs

Does C‑Tetra Advanced contain fragrance or essential oils?

No artificial fragrance—but it has a natural citrus scent derived from essential oils, similar to the original C‑Tetra range.

Can I use C‑Tetra Advanced if I've never used vitamin C before?

Yes—though it's 20 %, it uses gentle THDA and barrier-supporting actives, making it suitable even for first-time users

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Where do I layer Medik8 C‑Tetra Advanced Serum in my skincare routine?

Morning, after cleansing and toning, before moisturiser and sunscreen. Follow the order from thinnest to thickest ﹣ water/oil-based → gel-serum → moisturiser

Can I use C‑Tetra Advanced alongside Crystal Retinal?

Yes—supporting Medik8's CSA philosophy, vitamin C by day with SPF + vitamin A (Crystal Retinal) by night ﹣ they complement each other beautifully

Is Medik8 C‑Tetra Advanced Serum safe during pregnancy or breastfeeding?

It's a cosmetic product with no ingredients typically advised against—but always consult your GP or midwife for personalised guidance.

Our Medik8 C‑Tetra Advanced Serum review

We think C‑Tetra Advanced raises the bar for vitamin C serums in 2025. We believe its combination of 20 % tetrahexyldecyl ascorbate with phyto exosomes and acetyl zingerone delivers champagne‑grade brightening without flare-ups—even on combination, oily or sensitive skin. We know the gel texture absorbs rapidly, allowing it to be layered effortlessly under SPF—no pilling, no tackiness. From customer reviews like "skin felt soft and hydrated… forgot to moisturise" to editorial praise highlighting a "serious glow" and "fade post‑acne marks" in a week, feedback has been overwhelmingly positive. Our team particularly loves its suitability for oily skin, while still packing the benefits of phyto exosomes skincare science. C‑Tetra Advanced stands out as one of the best vitamin C serums UK 2025 thanks to its harmonious blend of performance, feel, and barrier-friendly formulation.

How to use Medik8 C‑Tetra Advanced Serum

Use in the morning, after cleansing and toning.
Dispense 2–3 pumps of the gel-serum onto your hand.
Massage gently across the face, neck, and décolletage.
Follow with a moisturiser and always apply SPF, which is essential for protection against the sun and the elements.
Layer serums from thinnest to thickest; apply C‑Tetra Advanced after water/oil‑based serums
Use alongside Medik8 Crystal Retinal at night for enhanced results (retinol by night, vitamin C + SPF by day)

Medik8 C-Tetra Advanced Serum 30ml

€85.00

Ex Tax:€69.11

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