I got this in a past month's box. On the EWG Skindeep website, it rates a very high 7, mostly for the fragrance ingredients, so I was hesitant to even give it a try. This serum was very stinky (which did not go away for quite some time), and my face started to itch almost immediately. Even after applying my usual moisturizer, I continued to itch for over an hour. I do not have any dark spots, so I cannot attest to the claim that it lightens them, and I will not be trying it again due to the reaction it caused, so I have no idea if it helps promote collagen. I will stick with my usual Truth Serum from Ole Henriksen.