The Vitamin C 23 Serum

$ 25.00 $ 20.00
  • Details
  • How to Use
  • Ingredients
  • About This Brand

What is it:  Hypoallergenic 23% Pure Vitamin C Brightening Booster. A high-performance, anti-aging solution designed to prevent early signs of aging while infusing your skin with the power of pure vitamin C.


Why we love it:

- Fade acne scars and hyperpigmentation

- Brightens dull skin

- Firms and plumps

- Diminishes fine lines and wrinkles


Clinical Results in 4 Weeks : 

- 16.26% improvement of pigmentation (visible melasma and blemishes)

- 32.89% improvement of triple-complexion skin tone (red skin tone)

- 32.36% effect of brightening (skin radiance)

- 16.36% improvement of elasticity (internal elasticity)

- 38.65% improvement of the pore (volume)

- 27.18% improvement of the pore (count)

- 4.18% improvement of skin age


*Based on clinical trials of 20 subjects. 

*Dermacosmetic Skin Science Laboratory Co., Ltd.


Please Read: 

- For the first use, attach the enclosed dropper in the product package.

- Recommended to use within 2 months of opening due to active ingredient protection.

- Gas can be generated due to the nature of Vitamin C.

- With a specially designed cap to seal, it can be safely stored by controlling the gas generated inside the container.



*Please use immediately after purchase and store upright in refrigerator once opened.


20ml / 0.67 fl. oz

After cleansing, during the serum phase, shake the bottle lightly once or twice from side to side and apply a few drops to the skin. Use fingertips to gently massage and absorb the serum, starting from the inside of the face working towards the edges.

Water, Ascorbic Acid(23%), Propanediol, Dimethicone, Tromethamine, Panthenol, Ethyl Ascorbyl Ether, Squalane, Caffeine, Sodium Chloride, Sodium Hyaluronate, Sodium Sulfite, Disodium EDTA, Glutathione, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Butylene Glycol, Arginine, Niacinamide, Pentylene Glycol, Alcohol Denat., Helianthus Annuus (Sunflower) Seed Oil, Glycyrrhiza Glabra (Licorice) Root Extract, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Beta-Carotene.

One of the most beloved K-beauty brands. Cosrx is known for its precise formulations and consistent performance thanks to a series of high-performing ingredients that drive results.

Customer Reviews

Based on 1 review
Used this for my wedding

Firstly, I have acne prone, dehydrated, sensitive skin. I have a lot of dark almost black scars from my acne and was wanting a vitamin c serum that had a high concentration but that didn't break the bank. Ladies and gents, I've found the one. This sinks and hydrates so deeply into my skin that my very extensive winter skin care routine was halved by including this item. It's light but still packs a punch. I have also used this during very hot summers and it never broke me out, just this, eye cream, and some sunscreen as my moisturizer and I was done. Speaking of eyes, I put this underneath my eyes for some collagen production and I don't think I've ever seen my under eyes so bright. I've also put this on active breakouts and it never irritated them unless they were open wounds, and I think it helped decrease the darkness of the scars later on immensely. This also helped with the look of my pores, preventing furure breakouts, and evening out my entire skin tone. I love this thing so much that I used it for just a month before my wedding and the difference it my skin was unbelievable. It made me glow from within and I got so many compliments. Now, there are some cons to it as well. It does need to be stored in the fridge bc of the high % of vitamin c, it can be a bit sticky and tacky feeling, it also smells like wet cat food which put me off so much but once I saw the results none of these things bothered me anymore. I will repurchase this again and again as the ONLY vitamin c serum that I need. The only time I won't use it is when I use retinol otherwise I love this thing.