--- product_id: 74163307 title: "Medik8 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: "$116.95" currency: USD in_stock: true reviews_count: 13 category: "Medik8" url: https://www.desertcart.us/products/74163307-medik8-c-tetra-lipid-7-vitamin-c-radiance-serum-30ml 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 Medik8 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:** $116.95 **Availability:** ✅ In Stock ## Summary > ✨ Unlock your skin’s radiant potential with Medik8 C-Tetra! ## Quick Answers - **What is this?** Medik8 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?** $116.95 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-medik8-c-tetra-lipid-7-vitamin-c-radiance-serum-30ml) ## 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 Results Without Compromise B Corp certified, Medik8, is a British dermatological skincare brand, globally renowned for age-defying heroes that deliver results without compromise. Clinically proven, our simple CSA PhilosophyⓇ of vitamin C plus sunscreen by day, and vitamin A (retinoids) by night addresses 90% of anti-ageing skincare needs for more youthful-looking skin. Results Without Compromise B Corp certified, Medik8, is a British dermatological skincare brand, globally renowned for age-defying heroes that deliver results without compromise. Clinically proven, our simple CSA PhilosophyⓇ of vitamin C plus sunscreen by day, and vitamin A (retinoids) by night addresses 90% of anti-ageing skincare needs for more youthful-looking skin. Shop Medik8 Visit the store Shop Medik8 Visit the store Clinically Proven Results We truly pride ourselves on the visible skincare results our customers achieve. It’s down to our choice of the best professional grade active ingredients expertly crafted into beautiful to use products - all without needing a prescription. Clinically proven via independent studies, robustly researched and rigorously tested. Clinically Proven Results We truly pride ourselves on the visible skincare results our customers achieve. It’s down to our choice of the best professional grade active ingredients expertly crafted into beautiful to use products - all without needing a prescription. Clinically proven via independent studies, robustly researched and rigorously tested. Dermatologist Recommended ''Medik8 combines medical-grade efficacy with cutting-edge skincare innovation.’' Dr. Ewoma Ukeleghe, Medical & Cosmetics Doctor Dermatologist Recommended ''Medik8 combines medical-grade efficacy with cutting-edge skincare innovation.’' Dr. Ewoma Ukeleghe, Medical & Cosmetics Doctor Meticulously Made by Us in the UK We craft and manufacture virtually everything ourselves from our own ISO-certified Innovation Centre, just outside London, UK. Harnessing the highest quality ingredients alongside patented technologies, means you can be assured of consistent UK standards of excellence in every product. Meticulously Made by Us in the UK We craft and manufacture virtually everything ourselves from our own ISO-certified Innovation Centre, just outside London, UK. Harnessing the highest quality ingredients alongside patented technologies, means you can be assured of consistent UK standards of excellence in every product. Patented Technologies From the Experts in Vitamin A Patented Technologies From the Experts in Vitamin A Our Founders’ Story Founded in 2009 by UK scientists and brothers, Elliot & Daniel Isaacs, Medik8 is renowned for skincare innovations. Our Founders’ Story Founded in 2009 by UK scientists and brothers, Elliot & Daniel Isaacs, Medik8 is renowned for skincare innovations. B Corp Certified B Corp Certified Medik8 is proud to be 1 of only 66 beauty manufacturers worldwide with this esteemed social and environmental impact certification. When you buy Medik8, you can be assured you’re not compromising on sustainability values like helping to reduce carbon, plastic waste or prioritising renewable energy. B Corp Certified B Corp Certified Medik8 is proud to be 1 of only 66 beauty manufacturers worldwide with this esteemed social and environmental impact certification. When you buy Medik8, you can be assured you’re not compromising on sustainability values like helping to reduce carbon, plastic waste or prioritising renewable energy. 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: Gorgeous orange smell - "I'm really pleased with this item. It's even better than I expected and I'm so glad I decided to buy it. Excellent quality, drops serum exactly as described, and I wouldn't hesitate to recommend it. Thank you!" ## 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 | 4,068 in Beauty ( See Top 100 in Beauty ) 100 in Face Serums | | Brand | Medik8 | | Brand Name | Medik8 | | Customer Reviews | 4.6 out of 5 stars 549 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 | | Package Size Name | 30ml | | 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 ![Medik8 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) ![Medik8 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 2](https://m.media-amazon.com/images/I/81gBsne-yfL.jpg) ![Medik8 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 3](https://m.media-amazon.com/images/I/81B1prG4h6L.jpg) ![Medik8 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 4](https://m.media-amazon.com/images/I/713YLDnutkL.jpg) ![Medik8 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 5](https://m.media-amazon.com/images/I/71YvBXFBauL.jpg) ## Available Options This product comes in different **Package Size** 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. ### ⭐⭐⭐⭐⭐ Gorgeous orange smell *by T***7 on 3 June 2026* "I'm really pleased with this item. It's even better than I expected and I'm so glad I decided to buy it. Excellent quality, drops serum exactly as described, and I wouldn't hesitate to recommend it. Thank you!" ### ⭐⭐⭐⭐⭐ Most try *by L***Y on 5 April 2026* I really like this, gives a nice radiance ## 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-medik8-c-tetra-lipid-7-vitamin-c-radiance-serum-30ml](https://www.desertcart.us/products/74163307-medik8-c-tetra-lipid-7-vitamin-c-radiance-serum-30ml) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-10*