This is the first time I've used this type of cosmetic product. It's a fascinating product that combines formula 1 and formula 2. I recently started using it because my complexion had become dull, and I heard that it contains a lot of glutathione, which is good for brightening. I've been using it consistently before bed. The amount seems small, but it doesn't feel that way when you use it. So I think one ampoule will last me for several weeks, and since there are multiple ampoules, it will last me a long time.

I couldn't really smell the fragrance, but since I'm the kind of person who applies skincare products before bed, I would have preferred if there was a scent. However, since this is just the base layer, the lack of fragrance isn't a big deal. Other than that, I don't have any other complaints yet! It's not overly watery, so I've just been using this one product before bed.