I would mention about cracking joints...

This can eventually lead to pain in the joints.

Mercury interferes with Vitamin C and therefore can lead to joint deterioration. For this reason, mercury toxic persons should supplement healthy amounts of Citrus Bioflavonoids (Vitamin C) to prevent C-deficient diseases from cropping up later, like arthritis and spider veins, to name a few.

Of course, this does even touch upon the numerous functions that C plays in the body, including protecting your body from the oxidative effects of mercury.