This is a very affordable vitamin C derivative serum. However, I've noticed no brightening effect after finishing up the whole bottle (using it twice a day for a month). The consistency is a bit viscous and slippery. It's got a light perfumery fragrance and a light orangey color. Because the serum contains a vitamin C derivative, it doesn't oxidize and doesn't irritate my skin at all. It felt nice on the face and there is a slight tackiness after application. But like I wrote, no effect at all but who knows maybe I've got to use it longer than a month but that also means buying more and I've got no plans to do so. Skip it and maybe buy another product with real vitamin C instead.