Can’t remember anything lately? Having problems recalling the right words or performing simple math like adding and subtracting? Taking longer to perform simple cognitive tasks? You may be on too much T3 if you’re on a high dose of desiccated thyroid or on the T3-only protocol. The brain has a very narrow range of what it considers optimal T3, and it achieves this by converting any T4 to rT3 if there’s too much T3 coming in, or by converting more T4 to T3 if there isn’t much T3 coming in. But someone taking no T4 or too much T3 can literally short circuit this mechanism, resulting in severe memory problems.
In one study, females with previous thyroidectomies who were stopping their levothyroxine dose (for more tests) were given cognitive tests when mildly hyperthyroid, normal, and profoundly hypothyroid. They took the longest to perform the same task when mildly HYPERthyroid, longer, in fact, than when they were profoundly HYPOthyroid! Graves’ hyperthyroid patients also tend to have problems with attention, memory, and complex problem solving. [References and more info on this topic at http://tiredthyroid.com/rt3-7.html]
I know I could not do simple subtraction when I was taking T3 + desiccated thyroid, but my math skills returned when I dropped back to just desiccated thyroid. I feel my memory and thinking have improved even more since I’ve lowered the desiccated thyroid and added some T4.
Has anyone else noticed any changes in their brain power with different levels of T3? Please share your story.