Make sure he's not eating any sugars. It feeds candida yeast and mercury and candida go together and worsen the condition.. Especially if he has cavitations as well. He will need to keep the bacteria level of his body under control by diet as much as he's able and to take a lot of vitamin C, vitamin E, zinc, magnesium and B complex if he can tolerate these things.

I'd suggest buying Andy Cutlers book "amalgam illness diagnosis and treatment". You'll find it online, possibly on amazon.

In the book, he goes through all the symptoms and gives allsorts of suggestsions for depression, and other symptoms. He also mentions cavitations and that if a person has them, they will most likely not be able to heal from mercury toxicity. Sad but true.

He said that a person with cavitations will not heal from amalgam removal alone.

cavitations most of the time do not produce pain or swelling, they are insidious, invisible and simply cause continual potent toxicity from bacteria, worse even than mercury.