Once on the drug, odds are they will never return to nature.
Lack of ocean salts/minerals use to be the main reason, but today there are so many reasons............................................... Population controls play a heavy part, to control the thyroid is a great way to control the longevity of the masses.
I see mercury and titanium dioxide as the 2 heavy hitters of why the thyroid is failing in proper function.
Look at the products you consume or apply to the body and see if the list ingredients does not say EDTA or even bold enough to say Titanium Dioxide. This along with trace mercury in your body leads to a bazaar chemical combination that leads to the death of the thyroid and sadly designed by big brother and used world wide on all humans. BOOK II is a general study into why the thyroid is under attack and why people born after 1992 may have a hard time seeing their 40th birthday, unless they wake up and take extra care of their body NOW.