For your thyroid you have to be 100% dental metal free and if you had mercury earlier in life, then you need to remove this daily for the rest of your life. You need to get away from titanium dioxide as much as possible, it is in most commerical foods and products for the skin/body. Mercury and titanium are your worse enemies and you must know your enemies if you are to be victorious. Many prefer to hide their heads in the sand and not see the butcher sneaking up.
The Amish healer cures your problem ONLY by intense fasting under expert care as suggested by the Cleveland Clinic in secret to him, he has cured women that were near death due to their thyroid disease.
Your son needs the lower bowel capsules and diet change and if need me fasting until all his problems are gone, it won't fail either of you when understood, accepted and applied, a clean body always is rewarded with a well connected Spirit that rewards all who beleive in a pure body.