One in the best solutions for dark under eye circles is actually by massage the location to improve the circulation. Liquid tears are specially targeted people with Dry Eyes.
Another one is actually by make a paste from egg yolk, some milk powder and honey. https://Pnt.flmsb.net/class/link.php?id=test&url=aHR0cHM6Ly9Xd3cuT3B0aWNhbGpvdXJuYWwuY29tL2FudGktYWdpbmctY3JlYW0tYW5kLWRyeS1leWUv