All: I had a total removal of my thyroid and of course the doctor put me on Synthroid and of course i had horrible symptoms. Now I have been on Armour for a year and felt great on it but I wanted to try both Thyroid S and Thiroyd because it is way cheaper and easier to get. The first time switching to Thyroid S I took the same amount as I was taking with Armour (4grains). After two week of just swallowing the Thyroid S I started to have symptom i.e. anxiety and heart palpitations so I went back on Armour and started feeling better again. I am now trying the Thyroid S again but this time I am chewing and placing it under my tongue for several minuted and then swallowing on a empty stomach (in the morning). If this does not work and the symptom come back then I will go back on Armour to reset and try Thiroyd. I know some of you will say to stay on the Armour because it works but I want to at least attempt to use the Thyroid S and Thiroyd so I can store a couple of year not to mention the very good price. The price for Thyroid S & Thiroyd is around .11 per 1grain and the price for Armour is .37 per 1grain (With Ins) and .47 per 1grain without insurance. I will update my findings with these products soon. By the way pimpom products has outstanding customer service!!