Thanks for your comment. I wrote to the nakers of Naturthroid a few weeks ago and have yet to hear back on the source of their product and whether they check for disease or inflammation in the thyroid tissue they use.
As for Dr. Mercola, his article is citing a sscientific study showing pigs have widespread inflammation due to their diets high in GMO foods. The article does not mention thyroid but made me think of the sourcing of the medicaitons..
Just because pigs are fed GMO feed, doesn't meant they are "diseased". Most of the products we eat these days have some sort of chemical additives, unless you make sure you are buying only totally organic foods, including the flour and sugar you buy, as well as all your fruits, veggies.
You would have to contact the makers of Armour, NatureThroid or whoever makes your brand of desiccated medication to find out where they are getting the pig thyroids they are using for the medication.
While Mercola has some really good articles and the GMO issue is certainly something to be considered, he's often "out there" a little too far.