I like the consistency of the NIGRIFIX GREEN TANGERINE VITA C DARK SPOT SERUM and the way it is absorbed by my skin. Although I feel that my skin is more hydrated after using it, I never saw any evidence of dark spots fading, even though I used it faithfully. My biggest disappointment is that the shelf on this isn’t particularly long, and even though I stored it in a cool, dark place, it went bad before I used the whole bottle. I've read that this is fairly common in serums containing vitamin C. Apparently, they don't have as stable a shelf life as those with other ingredients. I would recommend that you use this within six months of opening the bottle. I do think it's a reasonably priced serum, and I thought it worked well for hydration while doing very little in the way of fading dark spots.