C-Tetra® Eye

Overall rating: 4.797834 / 5 from 554 reviews.

AI Generated Review Summary

C-Tetra® Eye is a highly regarded eye serum that customers praise for its ability to brighten, plump, and smooth the delicate eye area. It effectively reduces fine lines and wrinkles, absorbs well into the skin, and leaves a smooth, radiant finish. While opinions on its effectiveness for dark circles are mixed, the overall results are described as excellent.

Summary topics

• Eye Appearance: 5%
• Visible Difference: 6%
• Product Texture: 7%
• Absorption Speed: 7%

Review topics: [serum, eyes, skin, results, texture, absorbs, feels, lines, circles, looks, eye area, difference, application, smell, works, use, addition, vitamin c, hydration, spatula, oil, effect, irritation, cream, wrinkles, bottle, residue, buy, improvement, consistency].

Review highlights

• "It absorbs quickly, doesn’t irritate my sensitive eyes, and gives a refreshed, brighter look in the mornings." — Maryna G.
• "It visibly smooths out wrinkle lines, does not irritate the skin." — Alina S.
• "Easy to use, light texture and improves dark circles and puffiness" — Chris B.

Reviews

Q&A

Will this help hereditary under eye dark circles?

Hi Sam, great question! In general, it is harder to reduce dark circles that are hereditary, than it is to reduce ones that are through lifestyle, for example. You could certainly try it, we do offer a 30 day money back guarantee, we just ask that the product is half-full.

Recently I got this product and wondered - is it ok that the bottle was empty for a third?

Hello Maria, Thanks for your question. I can assure you the amount in the bottle is completely normal and can advise that our C-Tetra is a 7ml fill in a 10ml bottle. The bottle is a Type 3 glass so it will have differing base level thickness's which will result in different appearances of the fill level (all will be 7ml). We also fill to a 1-3% overfill tolerance using weight and weigh all products at the end of the process to capture any miss fills. This is something we are working on and we are trying to transition to a smaller bottle in the future. Thanks, Medik8 Team

Hello, I was wondering if it's safe to use the C-Tetra Eye product at night as well, or is it recommended only for daytime use? Thank you!

Hi Kiym, thanks for your question about our C-Tetra Eye! Whilst there are no contraindications from using C-Tetra Eye at night and this can still continue to help stimulate collagen production, we have designed our Vitamin C range to be used in the mornings to fit our CSA Philosophy which is Vitamin C and Sunscreen by day, Vitamin A by night. Vitamin C used in the mornings help to protect the skin from free radical damage during the day and can help to enhance your protection when sunscreen is applied on top. We hope this helps! Thanks, Medik8.

I’m just wondering if I need to use something on top of the serum snd if so what is the best option? Will Illuminating eye balm be sufficient?

Hi Lisa, thanks for your question! You can use C-Tetra Eye alone if you wish or, you can apply either Illuminating Eye Balm or Advanced Day Eye Protect on top ideally to provide UV protection. Thanks, Medik8.

I have been using this serum for a week and have notified it is discolouring my under eye area giving the appearance of fake tan. There are no other side effects. Will this stop with continued use or is this product not suitable for my skin?

Hello Sara, It’s uncommon for C-Tetra Eye to cause discoloration resembling a fake tan, as it is a brightening Vitamin C serum designed to even out skin tone. Make sure you're applying sunscreen during the day, especially when using Vitamin C products. Sun exposure can cause pigmentation issues, and Vitamin C can increase photosensitivity. If the discoloration persists or worsens, it may be best to stop using the product and please do get in touch with one of our customer service agents and we will advise you further. If you have any further questions, please feel free to let us know. We're always here to help! Thanks, Medik8