[C20 (OST)]

Free Shipping + OST Original Pure Vitamin C20 Serum

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The best selling item of 2012 - 2014
the fastest effect with Vitamin C.
Need to tone up loose skin for keeping youth.

+ Includes Pure Vitamin-C 20%.
+ Whitening / Recovering trouble Scars.
+ Removing Blackheads.

** WAIT ! Before you order, please check the option box !
Option A, Only 1 Vitamin Serum
Option B, 2 Serums (22%OFF) with Free 1 Serum
Option C, 10 Serums (40%OFF) with Free 3 Serums

Brand : C20 (OST)
Volume : 30ml
All Skin Types
Made in Korea

** Required Reading ! 
The Vitamin C20 Serum's manufactured date is
3(Mar.2017. Get your the freshest C20 Serum !

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  • Reviews (1197)
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Original pure vitamin C20 serum,
simple skin care with only one Vitamin C.

Best awards winner 2013, 2014 ! Faster vitamin c effects with added peeling function.
Combine 20% L-ascorbic acid with natural antioxidants to help prevent premature signs of aging.
This serum will protect, soften and moisturizing your skin !


World best seller, Original Pure Vitamin C20 Serum is called as The miracle of one RED bottle.
100% Pure vitamin for remarkable, healthy skin.
Original Pure Vitamin C20 Serum contains about 6,000mg of 100% Pure Vitamin C. It contains 20% concentration of L-Ascorbic acid, which maximize the benefits, and additional feature of peeling function. As natural antioxidants, it helps prevent premature signs of again, while it protects, softens, and moisturizes your skin.

High portion of Vitamin C and still remarkably safe.
22.9% of Original Pure Vitamin C20 Serum is the real meaning of pure Vitamin C. One bottle of C20 serum contains vitamin c 40 times more than orange, 120 times more than strwberries and 200 times more than Mandarines.

Proved Effectiveness.
Original Pure Vitamin C20 Serum not only offers whitening, exfoliation and pore care effect, but also helps smooth the rough area on your skin, caused by spots or acne breakouts, when used regularly or long term. After using the serum, research shows positive result on skin condition. Out of 2075 respondents, who used Original Pure Vitamin C20 Serum :

  • 97.91% said, Skin looked brighter and more defined complexion.
  • 96.00% said, The serum reduced unwanted skin pigmentation and blemishes.
  • 92.20% said, Positive skin improvement after first usage.
  • 86.52% said, The serum smoothen out uneven texture.

Now, you can see that a lot of people in the world are using Original Pure Vitamin C20 Serum.

Before & After

How to use

1) Apply after cleansing and toning. Use 2~3 drops and smooth in gently all over face (Espacially smooth intensively the aged area such as pigmented or wrinkled lesions)
2) Initially, a slight tingling may be experienced. (a passing phenomenon)
3) Mixing with several drops of vitamin C20 and toner makes your skin refresh without being gooey.
4) After applying vitamin source C20, apply moisturizer is more effective.

* If you feel need more hydration, we recommend to vitamin sleep 9 to 5 crema. After applied C20 Vitamin serum, put on vitamin C cream over the layer. This combination will provide to you super synergy vitamin C effects. Learn more about Vitamin sleep 9 to 5 crema.


When you utilize this product please avoid using any products that contains high level of AHA, BHA (include Betain Salicylate), Retinal, Vitamin C (Ascorbic Acid).


Water, Ascorbic Acid, Alcohol, Sodium Lactate, Butylene Glycol, Glucose, PEG-60 Hydrogenated Castor Oil, 1,2-Hexanediol, Phenoxyethanol, Sodium Hyaluronate, Bis-PEG-18 Methyl Ether Dimethyl Silane, Xanthan Gum, Diethoxyethyl Succinate, Ammonium Acryloyldimethyltaurate/VP Copolymer, Carthamus Tinctorius (Safflower) Flower Extract, Citrus Aurantium Dulcis (Orange) Peel Oil, Glycerin, Zinc PCA, Panthenol, Niacinamide, t-Butyl Alcohol, Camellia Sinensis Leaf Extract, Beta-Glucan, Tocopheryl Acetate, Lecithin, Caprylic/Capric Triglyceride, Ubiquinone, Diisopropyl Adipate

This rating is based on 1197 customers review !
?? Tina TAKEDAYA Location : Skin types : Age : Location : Date My favorite!
5/5 This is sticky, but doesn't make pimples to me.
And gentle for my sensitive skin!
I'll probably repurchase.
?? Angelica Vegega Location : Skin types : Age : Location : Date Great
5/5 I have been using this serum for a year and have seen a big improvement in my hyper-pigmentation, especially if I use it after derma-rolling.
?? Hang Nguyen Location : Skin types : Age : Location : Date [C20] OST Original Pure Vitamin C20 Serum
4.5/5 I have a very sensitive and acne prone skin with a lot of acne scars. I used this C20 serum for 3 months. When I first used this serum, it stunk my skin a little bit. This sensation disappeared after one week of using. After 3 weeks, I can see that my acne scars started fading and my skin become brighter. I used this serum both day and night, and when I use it during daytime, I always put on sunscreen. Overall , this is a decent serum for its price. The only reason that I give this 4.5 stars is that after 2 weeks, some of the product inside the piping tip solidified and clogged the tip so I had a hard time using the piping tip.
?? Natalie Blanchard Location : Skin types : Age : Location : Date Perfect for Hyperpigmentation and Scars!
5/5 When I purchased this, my skin was going through a rough phase and this serum helped clear it up and even/brighten the overall tone. I have a nephew who is about two years old and he accidently scratched my face, leaving a little scar on my forehead. I put this serum on the scar every night and it disappeared completely. In natural daylight the scar was no longer visible and was totally gone. This is one of my favorite serums and I urge others to try it.
?? Carmen Revesado Location : Skin types : Age : Location : Date Gran producto
4/5 He comprado y usado tanto este como su hermano el c. 21 en varias ocasiones y aunque los dos hacen un trabajo excelente me decanto por el otro por la simplicidad de su fórmula, aunque he gastado varios botes de este para ir acostumbrando a la piel y me ha ido igual de bien. En cuanto a granitos y luminosidad lo he notado muchísimo. Aunque creo que este oxida un poco más que el nuevo reformulado

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