The most amazing Serum : C20 (OST) Vitamin C20 Serum - Review

8:00 AM

As I always say, great skin is always the first step in beauty. No amount of makeup caked up will help you and/or will be more important than having great skin.
I came across this little bottle on Wishtrend, which literally changed my skin and my beauty path for the best.
(Stay tuned til the end of the article for a 10% off code !)


Wishtrend is a beauty site selling Asian skincare and makeup products. You'll find a large range of brands which are more specific to skin issues , as well as many Korean brands as Wishtrend offers latest Korean trend to the global market with specific ingredients and skin targets. The prices are reasonable, and yes, Wishtrend delivers worldwide, some of their key products are even offered with free shipping so that you can try them without worrying about delivery cost.
The website also offers limited editions Wishboxes with special offers concerning one brand or one specific target like the Pore Boxe I reviewed on the blog here. I personally like opportunities like boxes which most of the time concentrate the best product at a cheaper price than its original value and it gives you the advantage to try as many product as you can. If you don't want to miss any special boxes from Wishtrend, check out their youtube channel where Eunice gives you amazing tips and presents you each product.
One major service Wishtrend offers and I haven't seen other website doing this, is that they give you the assurance of freshness of the products with the expiration dates. And this is why I especially ordered from Wishtrend for this item :

C20 - OST Original Pure Vitamin C20 Serum

This serum is one of the best selling item on the website and it gets raving reviews all the time. I HAD to try it and I'm glad I did. 

This serum is concentrated with 20% of Vitamin C which helps in :
- Reducing the appearance of any sun damages (brown spots included)
- Boosts the production of collagen for firmer skin
- Fades and help removing dark spots and evening out your skin
- Brightens up your skin
- It anti-oxidant benefits help prevent premature signs of aging 

If you have dull, uneven skin or spots scars. This serum is meant for you !

Ordering on Wishtrend

The shipping took 3 weeks If I recall right, and it's the standard time for a package from South Korea to come to my place here in Paris. I had a few samples thrown in too:


As I was saying Wishtrend tell you the date of manufacturing so that you can get the freshest batch of the product. Vitamin C has the tendency to go bad after a while because it's sensitive to warmth and is photosensitive.

To prevent the effect of photosensivity, the product comes in a brown bottle and it's recommended that you keep your serum in your fridge if you live in a warm environment. All of this steps , will help you get the most of your product.

30 ml of products with the basic serum packaging for 14,99$ instead of 24.99$ - Buy it here

How to use

When it's fresh, the product is clear and transparent. As time passes, you can tell that the product is starting to oxidize when it turns a strong yellow and there are a lot of crumbs of product stuck in it. After the 3 months mark my product is slightly yellow and there's only tiny crumbs in the pump, keep it in the fridge and you'll be able to use it for a longer time.

I apply the product with 3 to 4 dots all over my face and I massage it in. A lot of people experiences stinging a bit. I only experienced it once or twice when my skin was a bit irritated but, don't be alarmed and get pass that feeling. The other remark, some people has, is the fact that the product is a bit sticky and takes a while to absorb. While it's true that it's a bit sticky, I don't mind it and the stickiness is only unbearable when you apply too much product. It does take a bit more time than your general serum to get absorbed by the skin though but, if you're like me following a layering method of skincare, you should give each product some time to work and get absorbed before going for the next product.

My thoughts 

I've been using this serum for a little over 3 months now, and as you can tell from the title, I'm absolutely loving it. The main issue I suffer from with my skin is discoloration and generally uneven skin-tone, my whole body is literally a gradient of light brown. My face, in the same way, suffers from discoloration spots (those are thankfully barely visible) and suffer most prominently from : dark areas. The side of my mouth and chin are generally darker than the rest of my face.
From time to time, I'd also get a few pimples (you know what I mean) and those would leave dark scars. Now that I've started this serum, I have no pimple scars whatsoever. My uneven skin tone, is now even and brighter than ever. Last year was a pretty bad year for me and my skin, and it resulted with dull and stressed skin. I can tell you, that I don't think that my skin has been more even and brighter than how it is right now. As for the darkness around my mouth, it isn't all gone (that's not a shocker, really) but I'd say it has diminish by 60%. My skin must have been pretty bad because I do feel like I've gone half a shade lighter because of the general brightness and life it has now. I didn't break out from the product, and even though it doesn't claim that it does : I've noticed a diminution of little bumps and tiny pimples I usually have on my forehead.
This product has cleared out my skin so much that I actually like my skin naturally and I could actually go out without any foundation and I won't feel different. The general uneven skintone I had was the primarily reason for me to use foundation, but now, I could probably, just slather on some tinted moisturizer and be good to go.

I can't tell you about how much I'm loving this product. I'm even converting my sister and mother to try and adopt this amazing product. After 3-4 months, I'm halfway through the bottle so for the (really affordable) price, you get a lot. And if you keep your serum in the refrigerator, you can keep it pass the 3 months mark without the serum oxidizing.

New Product

The brand recently came out with an upgraded version of this serum. Adding 1,5% more of Vitamin C (trust me, this is a lot. There's only so much Vitamin C, your skin can support and so much Vitamin C that you can extract in its pure form). They also took out the filler ingredients that supposedly gave that sticky feeling to the product. I haven't try the new upgraded version yet, but it's said to be quicker to be absorbed by the skin with a smoother application.
I guess, I don't even need to tell you that I'll surely upgrade to the new version once I run out of the original version.

You can get the new version : Here for 24,99$

Promo Codes

Because it's not fun to talk about an amazing product without giving you the opportunity to try it with the best advantages :
  • You can get the original formula with instant free shipping (no code needed) here , and the product is permanently having a 40% off deal.
  • With orders of 55$ and more, with code WISHFEB2015 , you can get 10% off
  • Coupon Code : 033450111 - Get 5$ off of your order with ANY amount by registering to Wishtrend and writing this code in  the "friends invitation program" box in the registration form ! 
  • With ANY purchase, with the code WISHGIFTFEB2015 , you will receive the new COSRX Acne Pimple Patch's for Free.


There are new codes for each month, if you're reading this after February 2015,  check out the sidebar for the new codes !


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2 commentaires

  1. I've been suffering from acne and dark scars for the past month so this sounds absolutely perfect for me! Thanks for the review! I'm following you now btw xx

  2. Thank you ! If you try this I'm pretty sure you'll see great results as well !


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