Thank you for all of your suggestions !

He watchs his diet fairly well. No dairy, gluten, fish, citrus, or sulfur foods.

For chelation he tried DMSA 25mg every 4 hours.

He is going back to the dentist next week to see if he has any cavitations. He isn't experiencing any pain, so we weren't sure it that's a possibility.

Does anyone have any suggestions for depression / suicidal thoughts ?

Thank you !