Free Shipping + OST Original Pure Vitamin C20 Serum

New product

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.

Option A, Only 1 Vitamin Serum (40%OFF) : $14.99
Option B, 2 Serums (22%OFF) with Free 1 Serum
Option C, 10 Serums (40%OFF) with Free 3 Serums

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

** Required Reading ! 
The Vitamin C20 Serum's manufactured date is
5(MAY).2016. Get your the freshest C20 Serum !

[C20] Vitamin Sleep 9 to 5 Crema 

More details




- +

30 other products in the same category:

  • More info
  • Reviews (1136)
More info

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.
OST 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 OST 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.
OST 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 OST 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 OST 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, Ethanol, Sodium Lactate, Butylene Glycol, Glucose, Camellia Sinensis Leaf Extract, Rosa Davurica Bud Extract, Carthamus Tinctorius (Safflower) Flower Extract, PEG-60 Hydrogenated Castor Oil Sodium Hyaluronate, Bis-PEG-18 Methyl Ether Dimethyl Silane, Diethoxyethyl Succinate, Ammonium Acryloyldimethyltaurate/VP Copolymer, Xanthan, PEG-180, Gluconolactone, Beta-Glucan, Citrus Aurantium Dulcis (Orange) Oil,Zinc PCA, Panthenol, Niacinamide, Glycerin, Tocopheryl Acetate, Lecithin, Caprylic/Capric Triglyceride, Ubiquinone, Diisopropyl Adipate, Phenoxyethanol, Methylparaben

This rating is based on 1136 customers review !
?? Kimmy Pang Location : Skin types : Age : Location : Date Holy grail
5/5 I have been using this product for almost 2 years and I just bought my 4th bottle. This product is an magical product for my acne, acne scars and skin complexion.
I stopped using this product for 3 month because I thought it stopped working. I got a lot of acne due to my stress, but after using this product again my skin improved in just one day! It really sounds unbelievable, but I swear by this product. I will continue to purchase this.
However, you have to be careful when the vitamin C oxides, beause then the product will stop working. Only when it's clear, the product performs the best.
?? Tinah Marzuki Location : Skin types : Age : Location : Date Dissapointing
0.5/5 Unfortunately, this product did not work for me the least bit. There was no miraculous changes at all. My skin actually got darker ever since I started using this product, hence I stopped after 2 weeks of using it. I assume it is because it might have oxidized on my skin? I am not too sure (would love a proper explanation though). This is just my honest review of this product, I hope it doesnt come across as shaming it. It was just super disappointing :-( I bought other products from this website and they've worked well, just not this particular one. I had so much high expectations from it as I went through a lot of research before my purchase. Such a waste of money for me.
?? Carole DERBY Location : Skin types : Age : Location : Date Mitigée
3/5 Après avoir lu moultes éloges sur ce super sérum, je me suis enfin décidée de l'essayer, espérant que ce dernier viendrait à bout de mes taches de cicatrices d'acné récalcitrantes. J'ai testé le produit pendant 3 mois. Dans l'ensemble le bilan que je pourrai en faire est assez mitigé.
Les avantages:
- Effectivement ma peau parait plus "brillante", comme vitaminée.
- Le prix du sérum (en tenant compte de la livraison offerte) est très intéressant à comparaison des autres sérums du marché.
Les inconvénients:
- Pour autant, il n'y a pas eu d'effet révolutionnaire attendu sur mes taches (1 application tous les soirs).
- La texture une fois appliquée est désagréable, collante ce qui donne l'impression d'étouffer la peau. J'ai donc décidé de l'appliquer en mélange avec ma crème de nuit et le problème a été atténué.

Je ne rachèterai pas ce produit pour le peu d'effet qu'il a eu sur ma peau (j'aime les routines simples et je n'utilise des produits que s'ils ont une efficacité notable sur ma peau).
?? Siva Kumar Kataru Location : Skin types : Age : Location : Date super awesome product
5/5 i have been using c20 serum for a month its just amazing diminishes my acne scars improved skin tone n texture loved it
?? Taengoo Lor Location : Skin types : Age : Location : Date Works Well
5/5 Just got it yesterday, and i think it works pretty well. I see a little change, but not sure if it works yet. Just saw some little fading. Will probably order more or i might get the C21.5 version