C-Tetra Luxe - Balancing Vitamin C Serum For Face - Smooths Fine Lines and Wrinkles - Face Serum with Squalane - Vegan and Gluten Free - 1.0 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.

I got this great product to treat some patchy red skin on my neck from sun damage. I used it in conjunction with a prescription Retin A cream. One bottle later and the problem is gone. I’m ordering another bottle.

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!

I love this serum and have been using it for years. The texture like silk, the beautiful glow it gives and the amazing citrus scent. But I ordered this from Amazon for the first time and there is no scent at all, very disappointeing... I wonder if the company made a change or if I got a bad product..

This product has changed my skin and got rid of so many dark acne spots and uneven skin tone. I’m obsessed. This was my 4th bottle!

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.

I want to preface this by saying that I have other products by this brand that I love, but this one did NOT work for me. Worse, it broke me out in an itchy rash that required a steroid ointment. I don't usually have overly sensitive skin, and I have no known allergies. The first time I tried it (at night) my skin did not react immediately, but I woke up the next morning with a bright red face and itchy bumps all over my skin. I still wanted to give it the benefit of the doubt, because I used other skincare actives the night before, and I thought that maybe it was just too much. The next night, I applied it to my decollete and neck, where my skin is less sensitive, and no other actives were used. However, the rash I woke up with was even worse, and I ended up having to use a prescription-strength steroid cream for two days to calm it down. I did return this product for a full refund, there was no issue.

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.