NEW

Defend against the visible effects of premature skin aging and achieve accelerated skin brightening with a next-generation combination of 20% Vitamin C and Phyto Exosomes.

Delivered in a non-greasy, lightweight gel-serum, this intelligent ingredient complex combines potent, stabilized, Vitamin C with restorative Phyto Exosomes for visible brightening, skin smoothing, and daily antioxidant defense.

PROVEN RESULTS

BEFORE AFTER

77% increase in the visible skin brightening^[1]
1 week to skin looking more youthful with visibly improved wrinkles^[2]
1 week to visibly smoother skin texture^[3]

[1] Proven via independent clinical study conducted over 4 weeks on 32 participants. [2]Proven via independent clinical and consumer studies conducted over 4 weeks on 144 participants. [3]Proven via independent clinical study conducted over 4 weeks on 31 participants.

KEY BENEFITS

Dramatic Skin Brightening

Clinically proven to visibly brighten skin for a radiant, luminous complexion
Premature Skin Aging Defense

Helps shield the skin from daily environmental stressors & defends against the visible effects of premature skin aging
Smooth & Even Complexion

Improves skin smoothness and texture leaving a soft, polished finish
Primed & Refreshed

Hydrates, smooths, and primes leaving skin instantly refreshed

HOW TO USE

Apply as part of your morning skincare regimen, massage 2-3 pumps across the face, neck and décolletage. Follow with moisturizer and always finish with sunscreen.

Not sure what order to layer your serums? Take our serums layering guide quiz here.

KEY INGREDIENTS

20% Stabilized Vitamin C (Tetrahexyldecyl Ascorbate)

A highly potent and gentle form of Vitamin C for skin brightening & protection against premature skin aging.
Phyto Exosomes

Encapsulated by nature, it helps to deliver proteins, lipids, and messenger molecules to skin cells to help soothe & support the skin barrier.
Acetyl Zingerone

A super-antioxidant that enhances the benefits of Vitamin C, while providing the ultimate defense & protection against environmental stressors.
Multi-Weight Hyaluronic Acid

Instantly plumps and deeply hydrates for a soft, supple complexion.
N-Acetyl Glucosamine (NAG)

Smooths the look of pores, while helping to increase the skin’s own natural hyaluronic acid levels over time.
Full Ingredients

GOOD TO KNOW

CERTIFIED BY THE VEGAN SOCIETY
ARTIFICIAL FRAGRANCE FREE
DERMATOLOGICALLY TESTED
NON-COMEDOGENIC

FAQS

Does C-Tetra™ Advanced Gel-Serum contain fragrance/essential oils?

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C-Tetra™ Advanced Gel-Serum is free from artificial fragrances but does contain a natural, uplifting citrus fragrance derived from essential oils. The scent is refreshing and is designed to enhance your experience and offer an energizing start to your morning skincare regimen. If you are familiar with our C-Tetra™ and C-Tetra™ Luxe serums, you can expect to smell the same scent.
Can I use C-Tetra™ Advanced Gel-Serum if I’ve never used vitamin C before?

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Absolutely. Although C-Tetra™ Advanced Gel-Serum contains a potent 20% vitamin C, it has been formulated using a very gentle form of vitamin C called THDA (Tetrahexyldecyl Ascorbate) that is suitable for all skin types, even if you’re new to vitamin C. Alongside this, it contains many gentle actives such as Phyto Exosomes, which offer soothing properties to support the skin barrier. C-Tetra™ Advanced Gel-Serum is also proven to be gentle on all skin types in independent clinical and consumer testing. This means anyone can enjoy C-Tetra™ Advanced Gel-Serum without fear of irritation.
Where do I layer C-Tetra™ Advanced Gel-Serum in my regimen?

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C-Tetra™ Advanced Gel-Serum should be applied in the morning, after cleansing and toning, but before moisturizer and sunscreen. If you are using multiple serums, we recommend applying them in order of thinnest to thickest in texture. Since C-Tetra™ Advanced Gel-Serum is an emulsion, it should be layered on top of water and oil-based serums. This ensures your skin gets the full benefits of each product.
Can I use C-Tetra™ Advanced Gel-Serum alongside Crystal Retinal (vitamin A)?

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Absolutely. We recommend it as part of our pioneering CSA Philosophy(TM) which champions vitamin C plus sunscreen by day, and vitamin A by night as the simple secret to glowing, youthful-looking skin.
Can I use C-Tetra™ Advanced Gel-Serum if I am pregnant or breastfeeding?

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As a cosmetics company, we are unable to provide product advice for medical conditions such as pregnancy or breastfeeding. We strongly recommend discussing the ingredients with your physician before use. As general guidance, this product does not contain any ingredients which we would recommend avoiding during pregnancy unless advised by your physician.

SUSTAINABILITY CLAIMS

Provenance provides confidence for sustainability claims; helping to prevent ‘green-washing’ and empowering conscious consumers to purchase in line with their values. Provenance ‘Proof Points’ are all third party verified and evidenced through supply chains.

C-Tetra™ Advanced Gel-Serum

20% Vitamin C + Phyto Exosomes for age-defying brightness Full Details

Size: 1.0 FL. OZ (30 mL)

Product variants

Explore the C-Tetra Range

Texture
	NEW C-Tetra™ Advanced Gel-Serum	C-Tetra™ Luxe	C-Tetra™
Texture	Texture Lightweight Gel-Serum	Texture Rich Oil	Texture Lightweight Oil
Key Ingredients
Key Ingredients	Key Ingredients 20% Tetrahexyldecyl Ascorbate Phyto Exosomes Acetyl Zingerone	Key Ingredients 14% Tetrahexyldecyl Ascorbate Squalane Maracuja Oil	Key Ingredients 7% Tetrahexyldecyl Ascorbate Vitamin E
Skin Types
Skin Types	Skin Types All skin types, especially oily & combination	Skin Types Dry Skin	Skin Types Sensitive Skin
Benefits
Benefits	Benefits Brightening Age Defense Skin Nourishment Dark Spot Reduction Smooth & Even Complexion	Benefits Brightening Youth Boosting Skin Nourishment Dark Spot Reduction	Benefits Brightening Skin Nourishment

Dermatologist Recommended

Clinical Results

Age-Defying Experts

Made in the UK

B Corp Certified

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