To GetDaSilvaOut...

My friend Laura also had those issues that you had (headaches, tight muscles, especially around the neck and shoulders) with mercury toxicity, and with some research, we learned that Magnesium helped tremendously.

Mercury interferes with the utilization of magnesium and because muscles use magnesium to relax, they remain tight when it is not present.

This can be a horrible symptoms to live with. Hope this helps.