They say that dark circles are a product of kidney disfunction. I've had dark circles all my life, and I believe they are genetic. Is kidney disfunction genetic too? Possibly.
There are some cultures that have dark circles.
I have not been able to rid myself of dark circles by just OPing. However, OPing has given me a host of other positive health benefits.
I hope you achieve the results you desire. I wanted to let you know my experience.