firstly you shoud find out what is the cause of dark circle undr of eye,if you are anaemic,haemoglobin
is very law,if you are malnourised where deficiecy of vtamins like a,d,vit c and bcomplex are there.
so you take fresh fruit,juices,green vegetables,plenty of salads an plenty of fluids,diet rich in protein and minerals.
and any vitamin deficiency
you consult your doctor.
when you go out,wear good branded sun glass.