I started to worry about dark spots, so I was looking for a serum with lots of whitening ingredients like tranexamic acid. The whitening series is pricey, but Aqualabel is a good value. I've been using the first bottle for about two months now. I'm not sure if it has any whitening effects, but I'm using it to prevent further dark spots from appearing. I started to feel a little dry on days when I didn't wear it, so I realized that using it every day also had a moisturizing effect. Dryness is also bad for dark spots, so I'll continue using it for whitening and moisturizing!