This is not mercury toxicity, this is a nutritional deficiency caused by unwise supplementation. I bet so much zinc, vitamin C, and B vitamins (B6) have caused copper imbalance. Just stop EVERYTHING and go on a whole organic food diet. NOT EVEN A SINGLE PILL. Eat plenty of organ meats (very important), lean protein, EFAs, Vegetables and some whole grains.

Mercury is without doubt a big problem but sometimes people's arrogance is even a bigger one. It is never wise to start supplementation without understanding your body chemistry and mineral balance. Mercury toxicity with copper deficiency is very different from mercury toxicity with copper toxicity. Mercury is not the only variable in your problem.

Just remember that a good diet (paleo is the best) always wins against ANY supplement program, because it delivers nutrients in the right proportion.