[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
Feb.2017. Get your the freshest C20 Serum !

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  • Reviews (1168)
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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 1168 customers review !
?? Silvia Lorena Motta Carrillo Location : Skin types : Age : Location : Date The best
5/5 It's my third bottle, help me whit expresión lines, dark spot causes for acne.
?? Ann-Christin Wittmershaus Location : Skin types : Age : Location : Date Miracle!
5/5 This serum does everything it claims to do.
It really helped me with my acne scars and my skin is a lot smoother now.
This is probably my favorite product in my skincare routine.
The shipping was also pretty fast.
I will definitely repurchase it.
?? Ivy Chen Location : Skin types : Age : Location : Date Better than BHA/AHA on my skin
4.5/5 I was looking for a chemical exfoliator for my skin, and have tried 2 types of BHA and 3 AHA products. None have worked as well as the OST C20 Vitamin C. BHA/AHA left my skin irritated and even exacerbated my acne while the vitamin C is gentle enough for every day use and has made tremendous progress fading my PIE.
?? Emoke Antal Location : Skin types : Age : Location : Date Sticky miracle
5/5 This old version is really sticky, but it's really a miracle product! It hydrates and calms my skin and literally prevents every single pimple to form. Must have!!!
?? Hong Yi Tan Location : Skin types : Age : Location : Date Will definitely buy again
5/5 I suffered Cysts acne for more than 5years and that left my skin with some scars. I can see my scars fading slowly day by day after applying Vit C20 serum on daily basis. My scars are quite deep hence, I don't expect them to be faded immediately. I will definitely re-stock the serum once it runs out!!

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