[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
4(Apr).2017. Get your the freshest C20 Serum !

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  • Reviews (1201)
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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 1201 customers review !
?? Bianca Camille Bulaybulay Location : Skin types : Age : Location : Date Effective!
5/5 I have used up 1 bottle of this serum so far. I have oily acne prone skin, and I have plenty of hyperpigmentation left from previous breakouts. This product initially makes my face red after use, but it goes away after a while. It is also a bit sticky. I do see an improvement on my acne scars as they are now lighter and less visible.
?? Victoria Vu Location : Skin types : Age : Location : Date Noticeably brightening
4.5/5 Skin: Oily, acne-prone, PIH

In terms of a positive visible effect, this serum is #1 out of all the skincare I have tried. My skin was seriously brighter and smoother after 3 days of use. (Granted, this was one of my first skincare products and my skin was more tanned with more PIH than I do now. Also, I started using it once a day but that is because my skin is used to heavier acne treatments so I didn't feel the 'tingle'. I suggest those with sensitive skin start off more slowly). When I stopped using this serum for over a week, my skin became noticeably duller.

Watery texture is easy to spread, and I like how Wishtrend mentions the batch date so you can be sure you don't get an oxidised serum. It lasted 5 months for me before oxidising but I did have to cover the bottle in aluminium foil and store it in the fridge. Towards the end of the 5 months, crystals formed in the serum which I mistook for a strange growth and so I accidentally threw out the last of my serum

Overall, pretty great product, I would repurchase but I want to try out the C21 in the future because it has no alcohol. I hope they keep on improving in their future reformulations of this vitamin C serum and include ferulic acid and vitamin E.
?? Jasmin Cruz Romero Location : Skin types : Age : Location : Date Me encorazona
5/5 Tengo piel sensible-grasa y a esto hay que sumarle la rosacea y el acné,por ello es super difícil encontrar un producto que aplaque todo mi mal Dx el C20 me ha ayudado muchísimo con el acné, sobre todo con los puntos negros, no es que haya desaparecido todo por completo pero si es algo progresivo, puedes verlo si haces seguimiento con foto, que es lo que yo hago, y si, han bajado el nivel de granitos y las manchas se han reducido un poco, supongo que si sigo con el uso se veran mejores resultados.
Tambien ayuda mucho con la cicatrización de las heridas
Muy recomendado !! Me enflorece
?? Nathalie May Location : Skin types : Age : Location : Date Works well
5/5 I have combination skin with random breakouts. So I have a few acne marks on my face, and few redness. I tried this product after reading the reviews.I only use it at night after putting on my essence. I love the citrus/orange smell of it. A little bit sticky when you put it on but it does go away after a few minutes. Woke up the next day with my face looking fresh and after a month of use I did notice that my acne marks were fading and my skin brightened up. Will recommend this product to those who wants a cheaper whitening serum.
?? 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.

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