--- product_id: 74163307 title: "C-Tetra Lipid 7% Vitamin C Radiance Serum - 30ml | Vitamin C Serum, Fortified with vitamin E, Smoothing, Brightening & Nourishing, For New Vitamin C Users or Sensitive Skin" brand: "medik8" price: "$116.94" currency: USD in_stock: true reviews_count: 13 category: "Medik8" url: https://www.desertcart.us/products/74163307-c-tetra-lipid-7-vitamin-c-radiance-serum-30ml-vitamin store_origin: US region: United States of America --- # 7% Stabilised Vitamin C for potent brightening Lightweight jojoba oil-based hydration Low-irritation formula ideal for sensitive skin C-Tetra Lipid 7% Vitamin C Radiance Serum - 30ml | Vitamin C Serum, Fortified with vitamin E, Smoothing, Brightening & Nourishing, For New Vitamin C Users or Sensitive Skin **Brand:** medik8 **Price:** $116.94 **Availability:** ✅ In Stock ## Summary > ✨ Unlock your skin’s radiant potential with Medik8 C-Tetra! ## Quick Answers - **What is this?** C-Tetra Lipid 7% Vitamin C Radiance Serum - 30ml | Vitamin C Serum, Fortified with vitamin E, Smoothing, Brightening & Nourishing, For New Vitamin C Users or Sensitive Skin by medik8 - **How much does it cost?** $116.94 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/74163307-c-tetra-lipid-7-vitamin-c-radiance-serum-30ml-vitamin) ## Best For - medik8 enthusiasts ## Why This Product - Trusted medik8 brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Youthful Glow, Fast:** 7% tetrahexyldecyl ascorbate smooths fine lines & boosts radiance visibly. - • **Gentle Yet Effective:** Stabilised Vitamin C delivers brightening power without irritation—perfect for sensitive skin. - • **Complete Your Glow Game:** Pair with Medik8’s CSA Philosophy—Vitamin C by day, Vitamin A by night—for next-level age-defying results. - • **Effortless Morning Ritual:** Just 4 drops post-cleanse for a radiant base before sunscreen—fast-absorbing and lightweight. - • **Hydration Without Heaviness:** Jojoba seed oil nourishes deeply while keeping skin soft and non-greasy. ## Overview Medik8 C-Tetra is a 30ml vitamin C serum featuring 7% stabilised tetrahexyldecyl ascorbate, designed to brighten, smooth fine lines, and nourish sensitive skin with a lightweight jojoba oil base. Alcohol, fragrance, and paraben-free, it’s a dermatologist-friendly formula that enhances skin radiance and evens tone, making it ideal for new vitamin C users seeking gentle yet effective anti-aging care. ## Description Product Description Complete Your Regime C-Tetra Surface Radiance Cleanse Press & Glow Micellar Mousse Advanced Day Ultimate Crystal Retinal Advanced Night Restore Review: Brilliant reliable vitamin c serum - This is a brilliant vitamin c serum and is a staple repurchase for me. I have rosacea sensitivity and am in my 40s so vitamin c is a staple. I find the consistency very moisturising as well. Review: Fast drying and easy to apply. - This is a lovely vitamin c for your face. It dries quickly and feels great on my face. ## Features - INCREASED SKIN YOUTHFULNESS - 7% Stabilised Vitamin C (tetrahexyldecyl ascorbate), formulated to simultaneously smooth the look of fine lines and wrinkles while visibly boosting skin glow and radiance. - BRIGHTER, MORE EVEN COMPLEXION - Visibly brightens the skin tone, for a more even and healthy-looking skin appearance. Contains tetrahexyldecyl ascorbate - an effective, stabilised, and low-irritation form of vitamin C - LIGHTWEIGHT NOURISHMENT - This jojaba seed oil-based formula delivers effective yet non-greasy nourishment for visibly softer and comforted skin. - HOW TO USE - Step 1: After cleansing in the morning, massage 4 drops across the face, neck and décolletage. Step 2: Leave to absorb before applying sunscreen. - COMPLETE YOUR REGIME - For maximum age-defying results, we especially recommend using this product as part of our pioneering CSA Philosophy; vitamin C plus sunscreen by day, vitamin A by night. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07GFS6WXH | | Active Ingredients | 14% Stabilised Vitamin C, Vitamin E | | Benefits | Brightens Skin Tone & Minimises Signs of Ageing | | Best Sellers Rank | 2,883 in Beauty ( See Top 100 in Beauty ) 86 in Face Serums | | Brand | Medik8 | | Brand Name | Medik8 | | Country Of Origin | United Kingdom | | Customer Reviews | 4.6 out of 5 stars 547 Reviews | | Item Form | Drop | | Item Type Name | C-Tetra | | Item Volume | 30 Millilitres | | Item Weight | 0.09 Kilograms | | Manufacturer | Medik8 | | Manufacturer Part Number | P06227 | | Material Features | Antioxidant | | Material Type Free | Alcohol Free, Fragrance Free, Paraben Free, Vegan | | Model Number | P06227 | | Number of Items | 1 | | Product benefits | Brightens Skin Tone & Minimises Signs of Ageing | | Recommended Uses For Product | Wrinkles | | Scent | vitamin C serum | | Scent Name | vitamin C serum | | Skin Tone | Uneven | | Skin Type | Sensitive | | Skin type | Sensitive | | Special Ingredients | 7% Stabilised Vitamin C, Vitamin E | | Special ingredients | 7% Stabilised Vitamin C, Vitamin E | | Target Use Body Part | Face | | UPC | 818625024338 818625020989 | | Unit Count | 30.0 millilitre | | Use for | Face | ## Product Details - **Active ingredients:** 14% Stabilised Vitamin C, Vitamin E - **Brand:** Medik8 - **Item form:** Drop - **Item weight:** 0.09 Kilograms - **Material feature:** Antioxidant - **Product benefits:** Brightens Skin Tone & Minimises Signs of Ageing - **Scent:** vitamin C serum - **Skin type:** Sensitive - **Special ingredients:** 7% Stabilised Vitamin C, Vitamin E - **Use for:** Face ## Images ![C-Tetra Lipid 7% Vitamin C Radiance Serum - 30ml | Vitamin C Serum, Fortified with vitamin E, Smoothing, Brightening & Nourishing, For New Vitamin C Users or Sensitive Skin - Image 1](https://m.media-amazon.com/images/I/619Ttc7Pd6L.jpg) ## Available Options This product comes in different **Pattern** options. ## Questions & Answers **Q: Is this genuine Medik8 products verified by their stockist?** A: Hi la shazza, hope you are well ! Yes, all the products we sell are authorised and verified by our chosen stockist . Is there anything else I can help you with ? Thanks Facial Experts UK **Q: What % vitamin c** A: Tetrahexyldecyl ascorbate (3%): New lipid soluble vitamin C derivative with four times higher efficacy than equivalent L-ascorbic acid D-alpha tocopherol (natural vitamin E) (1.0%): antioxidant; helps protect the skin from free radical damage and acts as a network of antioxidants with vitamin C **Q: Should this be kept in the fridge?** A: No, just make sure it’s kept out of the sun and it’s often recommended not kept in bathrooms. **Q: Is it water based or oil based?** A: Oil ## Customer Reviews ### ⭐⭐⭐⭐⭐ Brilliant reliable vitamin c serum *by A***A on 23 May 2026* This is a brilliant vitamin c serum and is a staple repurchase for me. I have rosacea sensitivity and am in my 40s so vitamin c is a staple. I find the consistency very moisturising as well. ### ⭐⭐⭐⭐⭐ Fast drying and easy to apply. *by L***! on 9 December 2025* This is a lovely vitamin c for your face. It dries quickly and feels great on my face. ### ⭐⭐⭐⭐ Medik8 C-Tetra *by S***E on 10 May 2026* I didnt give this a 5 star as ive not used it,i got it for my daughter, she uses it all the time (she would give it a 5). She likes the smell of it, and said her skin feels moisturized after use, i think its a bit expensive but you only get what you pay for, i suppose, if it makes you skin appear less wrinkled & smooth its worth the money. My daughter would recommend this serum, and will continue to use it. ## Frequently Bought Together - MEDIK8 C-TETRA 30 ML P06227 - Medik8 Total Moisture Daily Facial Cream - Hydrating Peptide Face Moisturizer with Hyaluronic Acid - Plumps Skin - Supports Skin Barrier - 1.6 oz --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/74163307-c-tetra-lipid-7-vitamin-c-radiance-serum-30ml-vitamin](https://www.desertcart.us/products/74163307-c-tetra-lipid-7-vitamin-c-radiance-serum-30ml-vitamin) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-10*