To be honest it depends on what is causing your dark circles and how bad they are?
The models on QVC do not have what I would actually call dark circles. Some say drink more water and get a good nights sleep. If they are heredity or like mine caused by sinus problems for which I have to take medication all year round, nothing works apart from a good concealer and even then they are not totally covered.
Some eye creams have a brightened effect which does nothing for mine, but I am sure someone will know the name of one.
I do believe what makeup artist Christopher Drummond once said,"No one but you notices your dark circles. No one will be pointing at you in the street commenting on your dark circles." Women are always picking apart their own imperfections when others don't even notice you have them.