Product Review: OST C 20 Original Pure Vitamin C20 Serum

OST C 20 Original Pure Vitamin C20 Serum,
OST C 20 Original Pure Vitamin C20 Serum,

Vitamin C is one of the must-have ingredients for anti-aging and ‘whitening’, and the serums can be very costly. I was glad I found this 20% concentration serum at Jolse.com, at just US$16.99 for 30ml(!). It’s made in Korea from a brand that I was not familiar with, but the product is packaged right – tinted glass bottle with a dropper dispenser. Also, it’s fragrance free! 🙂

OST C 20 Original Pure Vitamin C20 Serum, 30ml, US$16.99 at Jolse.com
OST C 20 Original Pure Vitamin C20 Serum, 30ml, US$16.99 at Jolse.com

It also contains a lot of beneficial ingredients such as Niacinamide, Q10, panthenol, sodium hyaluronate, etc. in a pure ascorbic acid (Vitamin C, not its derivative) formula. I was sold right away.

The texture of this is semi-viscous. It does feel sticky, but that is normal. Vitamin C serums are often oil based and this one contains a couple of oils. You need just 2-3 drops at a time and be sure to spread quickly because it will absorb very quickly. If you have sensitive skin, this might sting a bit; or sometimes when I have chapped skin or skin that’s peeling, it will sting a bit too. It is a normal reaction for initial use for some people, and the reaction should subside with continued use. Despite the oil, it is not oily.

I find that this has helped me brighten my dehydrated skin that tends to look a little dull (from dehydration), but it has not dramatically changed my skin yet. Mind you, I do not have blotchy, uneven skin tone or large pores, but I was hoping it will at least fade away some of my freckles in my ‘apple zone’, which it didn’t. Still, in my late 30s, I need Vitamin C since it is a powerful anti-oxidant, and compared to some of the AHAs, it’s still a milder form of exfoliant to keep my skin bright and clear. It does keep my skin clear and bright since I started using it more than a month ago. I have been using it twice daily, under my makeup/moisturizer/sunscreen without any issues.

OST C 20 Original Pure Vitamin C20 Serum list of ingredients
OST C 20 Original Pure Vitamin C20 Serum list of ingredients

Compared to most Vitamin C serums, the OST C20 is still very inexpensive, and it does its job. For the amount you are getting (30ml) it is quite a steal. It won’t give you dramatic results (most anti-oxidants won’t; they are more preventative), but I would recommend this to anyone who wants to keep their skin in good condition. 🙂

5 comments on Product Review: OST C 20 Original Pure Vitamin C20 Serum

  1. Elena
    June 11, 2015 at 12:19 am (2 years ago)

    Hello, Joseibi,

    I’m glad to see more Korean skin care products being added to your blog. Yours was one of the blogs I kept consulting when I first started using Korean cosmetics a couple of years back.
    I have already finished a bottle of the OST Serum and completely agree with what you say about it. I’m thinking of soon ordering the newer version which is 21.5% Vitamin C, lack the alcohol, the niacinamide which many people have noted does not work together with vitamin C. Also they say the new version is considerably less sticky than the Vtamin C 20.

    Reply
    • Joseibi
      June 11, 2015 at 2:25 pm (2 years ago)

      Thanks Elena!

      For the past 5 months or so I didn’t post much. I was using a bunch of products, all non Korean or Japanese, and very ineffective…pricey and boring. I will eventually reviewed them more as a warning not to buy! 😉 I did not know about the new version of the OST Vitamin C serum. I am glad they are taking out the alcohol. And good to know it’s less sticky too! 🙂

      Reply
      • Kevin J.
        June 11, 2015 at 11:42 pm (2 years ago)

        I have been realizing that there is this new trend of products made solely for a country’s domestic market(such as Hong Kong, Malaysia, Singapore, Japan and Taiwan), that are manufactured in Korea but not sold there, probably a result of the state of technological development in terms of cosmetic manufacturing over there. There are a lot of brands out there like that such as The Golden Shop in Japan(sold only in department stores in the satellite neighborhoods), Legere (for the Taiwanese market), and Pure Beauty (for the Singapore, Malaysia and Hong Kong markets). I have never tried any of these before, but they all seem to use the “made in Korea” tagline to sell, although I have NEVER EVER seen them before when I lived in Seoul.

        Reply
        • Joseibi
          July 28, 2015 at 11:12 am (2 years ago)

          Possibly like a ‘private label’? I know the Regene brand in Hong Kong started out the same way – it’s made in Japan, but if you know Japanese, the Japanese words on the Regene packaging (this is from my experience years ago when Regene first started) are very poor Japanese, not grammatically correct (similar to Google free translation). It is made by a private Japanese company but nothing famous, but through smart marketing the brand was able to propel itself to a good place in the HK market at the time.

          Reply
          • Kevin J.
            July 29, 2015 at 1:43 am (2 years ago)

            The Korean on the packaging of Legere is actually relatively short and simple, and it has more Chinese and English on it. I find that the ideas seem to be Korean, such as using natural ingredients including snail secretion extract and etcetera, but otherwise, these products are packaged in ways which do not feel or look Korean.

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