Medik8 C-Tetra Vitamin C Face Serum with Squalane Lightweight Daily Facial Serum Vegan 1.0 fl oz

Medik8 C-Tetra Advanced has become one of my go-to morning serums. I love that it delivers all the brightening benefits of vitamin C without the irritation or heaviness that stronger formulas can sometimes cause. The texture is a lightweight gel-serum that absorbs quickly and layers beautifully under moisturizer and SPF—no stickiness, no pilling. Within a couple of weeks of consistent use, my skin looked noticeably more radiant and balanced. I also noticed a subtle plumping effect, especially through the cheeks, and my skin felt well-hydrated throughout the day. It gives that healthy, lit-from-within glow rather than an artificial shine. What really sets this serum apart for me is how gentle yet effective it feels. Even with daily use, my skin barrier stayed calm and happy, which isn’t always the case with vitamin C. It’s a great option if you want visible brightening, hydration, and antioxidant protection without compromising comfort. Overall, Medik8 C-Tetra Advanced feels like a smart, elevated vitamin C—perfect for everyday use and especially great if your skin prefers a more balanced, modern formulation.

Smells like oranges and works like a dream. No irritation, helps with dark spots and uneven tone. Completely worth the money! There’s no oiliness associated with it at all.

This was recommended to me and it did not disappoint. I put it on a dark spot that was appearing on my cheek. Noticed significant decrease in darkness of spot after only a couple of weeks. I will be continuing to use and recommend this product.

I love the smooth creamy feel. Nice absorption into my mature skin.

This is gentle on sensitive skin but very potent. After trying numerous ascorbic acid (Vitamin C) products, and finding them irritating plus not very effective since they tend to break down (research how to tell if your products are losing effectiveness/breaking down), I decided to splurge on this. It's a different form of vitamin C, still strong but much more stable. Absorbs very well, lays under makeup smoothly, and after daily use for the last few months, my skin is glowy and bright. I even signed up on their website for a subscription service (really nice reward opportunities there). Pic is of me with just lightly tinted sunscreen on after about 6 weeks of use.

No allergies, no reaction! To go product for 3 years

I'm 60. I've used many products in an effort to reduce wrinkles. This product is the only one out of hundreds I've tried over my lifetime that has actually made a huge difference in my skin. I'm thrilled with the results.

It’s fantastic

Love the way it feels when I put it on my face So smooth and silky!