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✨ Glow smarter, age slower with Medik8 C-Tetra 💼
Medik8 C-Tetra is a lightweight, vegan vitamin C serum featuring 7% stabilized Tetrahexyldecyl Ascorbate, squalane for hydration, and vitamin E antioxidant protection. Designed for all skin types, it smooths fine lines, evens skin tone, and boosts resilience with fast absorption and clean, science-backed ingredients.













| Asin | B002KKZQ84 |
| Best Sellers Rank | #381 in Facial Serums |
| Item Model Number | 630503 |
| Manufacturer | Medik8 |
| Product Dimensions | 2 x 1.3 x 4.5 inches; 2.88 ounces |
| Upc | 818625029036 818625023317 |
User
Gentle, Effective, and Great Value – My Go-To Vitamin C Serum
I’ve purchased this serum three times in the past 15 months and use it every morning. Each bottle lasts me about 4-5 months, making it a great value. Unlike many vitamin C serums that leave your skin feeling tacky or sticky—or cause other products to pill—this one absorbs beautifully.I struggle with sunspots (thanks, Dad!), and this has faded them to the point of being nearly invisible. I have dry, sensitive skin and have had no issues using this product. While the recommendation is four drops, I tend to use more, applying it to my face, neck, and chest, then using any leftover on the backs of my hands. The serum has a lovely silky feel and a mild citrus scent that I really enjoy.One thing to note: the glass bottle and dropper require care. I accidentally dropped a dropper in my sink, and it shattered. Thankfully, I already had a backup bottle ready.At 57, I know the importance of following up with a good sunscreen, and I highly recommend doing so. Overall, this is an excellent vitamin C serum that delivers real results and is well worth the investment!
User
A must try!
I've had my fair share of Vitamin C serums that left my skin irritated and prone to breakouts, but this one is a game-changer! It's surprisingly mild, yet still delivers noticeable results. My skin feels brighter and more even without any of the harsh reactions I’ve experienced with other formulas. It’s gentle enough for daily use, and the light citrusy scent is a lovely touch—it’s refreshing without being overwhelming. If you’re looking for a Vitamin C serum that’s effective but won’t irritate, this one is definitely worth trying!
User
Smells fantastic and fresh like oranges, repurchased because I like it!
I liked it so much I repurchased. It smells fresh and feels good. I know I am supposed to use a vitamin C, and this one was recommended to me. It really seems to be high quality. I top it with a peptide serum in the morning.
User
Top 1 best vitamin C, even for mix skin tone
One of the top three vitamin C I’ve ever had. This product is really good. I read the reviews and they say it’s too oily, but it’s not. Just used a little bit. LESS is more. I am putting four star to make it look human. I am a real customer and five makes it look sus. But yeah, it is five star.
User
Love
Love this productMakes a huge difference in my skin
User
Serum
I like this serum for my face, it gave a fresh tone
User
Great product!
I love this product! Get it wherever I find the best price.
User
Caution when purchasing from this vendor!
Not sure if this is a manufacturer or Amazon delivery issue. The liquid contents are below the letter M. No wonder it was on sale for prime day. Rip Off!
User
Ottimo
Ottimo
User
The best skin product ever
I was told about this product by a beautician and it's been a revelation. My skin is much softer and I need hardly any moisturiser after 4 months of use. I've recommended it to my sister and son, who both suffer from very dry skin on their face and they saw an immediate improvement. I use 4 drops every morning and use Medik8 Retinol 3TR every other evening. I love it!
User
Vitamina C espectacular
Esta va tiamina C es maravillosa.Llevo años usándola,da vida a la piel de una manera increíble.La mejor de todas las usadas,Medik 8 no falla nunca
User
Sehr gut
Nurmal
User
Siero alla vitamina C veramente efficace
Strepitoso!
Trustpilot
3 weeks ago
1 week ago