Ampoules ideal for vitamin c

I had been looking for a vitamin c serum for a long time and ended up with this product. Vitamin C is a very unstable ingredient and the fact that this product is packaged as ampoules makes it ideal. I use an ampoule 3 times, every morning. So I'm going to do a month with a package. I've just been using it for a month and I feel like my skin is clearer and my blemishes are less. So far so happy with it and I'm curious about the long-term effects.

Translated from Dutch by AWS