Remember that candida overgrowth and parasites often go hand in hand.
Do you have a good reason to say that or is it only your belief ?
Dark circles are almost always the sign of a poor functionning liver.
Let me correct that for you :
Dark circles are probably influenced by a poor functionning liver.
But it can also be an irritated small intestine, an irritated colon, an irritated rectum, deposits or slow elimination in the colon, deposits in the kidneys, an infection in some organs or in the head, chronic poisonning, accute poisonning, etc...