Hey Martha, sorry so late on responding! Yes, the most important tests regarding thyroid function are TSH, free T3 and free T4...my TSH is high and my FT3 & FT4 are low in relation.
The supplement I'm taking is called Metabolic Complex from MBi Nutraceutical. I got it from my Naturopath (long story, but working with her in conjunction w/my general doctor). It contains B vitamins, Kelp, and bovine thyroid, adrenal, spleen, thymus & pituitary tissue. I am also taking Adrenal Complex from the same manufacturer.
I just saw my general doctor today, and she agrees w/the naturopath about my thyroid levels & encouraged me to stick w/the Metabolic & Adrenal complexes for at 8 weeks & see what my levels look like at the next blood test. If not improved, she will prescribe me Armour.
I understand that the reason Armour works for some people that don't have success w/synthetic thyroid meds is because some people just can't make t3, so taking the dessicated thyroid tissue gives you t3 and t4.
Anyways, that's what I know.