🌿7 days to visibly reduced wrinkles(1)
🌿0% barrier disruption (1)
🌿7 days to visibly smoother skin texture(1)
🌿90% reduction in pollution damage to the skin's surface(2)
[1] Proven by an independent clinical study conducted over 4 weeks in 32 participants. [2] Proven by in vitro protein carbonylation data against particulate matter pollution of the stratum corneum and epidermis. [3] Proven by an in vitro protein carbonylation study using European Standard Reference Environmental Pollutants.
Traditional serums with high concentrations of vitamin C can break down before they reach the skin or cause irritation. C-Tetra Advanced is carefully formulated with a 20% stabilized vitamin C complex, which ensures long-lasting action from the first to the last drop.
Phyto-exosomes, encapsulated by nature and derived from green tea leaves, are rich in proteins, lipids and messenger molecules. They act as intelligent microcarriers, carrying important signaling molecules such as peptides and nutrients to send signals to skin cells, strengthening the skin barrier for optimal skin tolerance and comfort.
This next-generation formula is also fortified with omni-antioxidant acetyl zingerone, helping to protect skin from pollution damage. It neutralizes free radicals, blocks harmful pollution particles and strengthens skin’s natural defenses, increasing skin’s resilience. Daniel Isaacs - Chief Product Officer
Frequently Asked Questions
What vitamin C strength does C-Tetra Advanced have?
C-Tetra Advanced contains 20% stabilized vitamin C (tetrahexyldecyl ascorbate).
Can I use C-Tetra Advanced in addition to Crystal Retinal (vitamin A)?
Absolutely. We recommend it as part of our groundbreaking CSA philosophyⓇ, which promotes vitamin C plus sunscreen during the day and vitamin A at night as the simple secret to radiant, youthful-looking skin.
Can I use C-Tetra Advanced if I am pregnant or breastfeeding?
As a cosmetics company we are unable to provide product advice for medical conditions such as pregnancy or breastfeeding. We strongly recommend that you discuss the ingredients with your GP or midwife before use. As a general guideline, this product does not contain any ingredients that we would need to avoid during pregnancy unless otherwise advised by your doctor.
Can I combine C-Tetra Advanced with Liquid Peptides Advanced MP in the morning?
Yes, you can. C-Tetra Advanced and Liquid Peptides Advanced MP are both emulsion-based serums, but C-Tetra Advanced has a slightly thicker texture. We recommend applying serums in order of thinnest to thickest consistency. Therefore, apply Liquid Peptides Advanced MP first, followed by C-Tetra Advanced.
Does C-Tetra Advanced contain fragrances/essential oils?
C-Tetra Advanced is free from artificial fragrances, but does contain a natural, uplifting citrus scent derived from essential oils. The scent is refreshing and is designed to enhance your experience and provide an energizing start to your morning skincare routine. If you are familiar with our C-Tetra and C-Tetra Luxe serums, you can expect to smell the same scent.
Where can I use C-Tetra Advanced in my routine?
C-Tetra Advanced 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. Because C-Tetra Advanced is an emulsion, it should be applied over water- and oil-based serums. This way, your skin will get the most out of each product.
Can I use C-Tetra Advanced if I have never used vitamin C before?
Absolutely. Although C-Tetra Advanced contains a whopping 20% vitamin C, it is formulated with a very mild form of vitamin C, THDA (tetrahexyldecyl ascorbate), which is suitable for all skin types, even if you are new to vitamin C. It also contains many mild active ingredients, such as phyto-exosomes, which have soothing properties and support the skin barrier. C-Tetra Advanced has also been proven to be mild on all skin types in independent clinical and consumer tests. This means that anyone can use C-Tetra Advanced without fear of irritation.
I think there is still product in my bottle that I can't get with the pump. What should I do?
Because C-Tetra Advanced is a light emulsion, it is slightly thicker than water-based serums and may therefore flow more slowly. However, it is designed to be used with a pump, so it should still dispense easily. If there is any residual product that the pump is not dispensing, you can unscrew the pump and turn the bottle upside down to pour out the remaining product. This should not be necessary unless you have almost used up the product.

