Has anyone heard of Dr. Jerry Tennant and his book Healing is Voltage? Very basically, he says that disease is the result of low voltage in the body (cells, organs, etc.). If I remember correctly, low voltage is caused by bad nutrition, toxic chemicals, mercury fillings and root canals. Many people have hypothyroidism largely as a result of fluoride in-take. Lugol'sIodine helps enormously to bring the body back into balance.
Much of this is addressed in a series of talks he gave in 2010, on You Tube.
All of the talks are here: http://www.youtube.com/watch?v=sPtP5KWkNOg&list=PLCBA8FD0F6CB661A2