Having problems regulating elevated T3, while T4 is mid-range and needs elevating. Wondering if any who are on desiccated Thyroid, (ERFA, Armour, etc.), have experienced this. I usually exercise more and haven't been....snow, snow, snow...but don't know if it would help use up the excess T3 that is making me hyperthyroid. T4 needs to be higher too. If you've combined natural with synthetic T4 have you seen any difference? Don't want to go back to Synthroid completely but would appreciate any experiences you've had that are similar and/or what your Dr. recommended or if you've tried the combo and what results you had.