I agree with you completely.  I had to switch to a synthetic for a short time, which was horrible.  I have had many problems come back to life once I started on the synthetic.  I finally was able to get Armour Thyroid again, but it is obvious they changed the formula. It smells different, tastes different, and the color isn't quite right. I thought it would be fine and work like before.  My horrible symptoms are still continuing, even on the "new" Armour Throid formula.  Seriously, I am hoping someone will start a class action lawsuit, sign me up as well!  They are being negligent with the health and well-being of the american people!