If you’re curious about the Korean OST Vitamin C20 Serum or might want to try if it works for you, then here’s my video review for this korean product.
In retrospect, I would not recommend Korean Vitamin C serum: OST Vitamin C20 Serum for dry or sensitive skin. This highly concentrated product is mainly suited for oily, combination skin, problematic acne prone skin, troubled skin or if you have acne scars. Also works against lines and wrinkles, but be careful. OST Vitamin C20 Serum is a powerful and effective Korean skin care product.
Here is the video review on OST Vitamin C20 Serum.
Read my full first impression review here.