CORS Serum I bought with my own money

The product I'm going to introduce is my absolute favorite, the COSRX The Vitamin C 23 Serum.

I chose this product with extreme caution because it is responsible for my facial whitening. I have been using it consistently for two years and seeing results, so the downside is that I can't stop using it and it has become a fixed expense.

It’s both a pro and a con, so it’s funny and sad at the same time, but I suppose I should spend money on products that are effective, right?

If whitening products do not agree with you, please make sure to lower the level to 21.

The stinging sensation doesn't mean it's not working; it means it's improving.

Even if you experience any trouble, please make sure to use it; if you take a short break and repeat the process, things will gradually change before you know it.

I was one of those people who didn't agree with whitening products!