COSRX The Vitamin C 23 Serum

The product I would like to introduce is the COSRX The Vitamin C 23 Serum.

Among Vitamin C serums, this one is affordable and effective.

Since it's a large capacity, it feels wasteful to have to use it within a month, but still

I think it's good because it's affordable. Please make sure to keep the vitamin serum refrigerated before use.

Even though it's only been two months since I didn't refrigerate it and only took it out at night, it has oxidized like that.