My current thyroid doctor said she wants to rely on my TSH levels to monitor my desiccated thyroid meds (because I am on desiccated and not synthetic).

My Free T4 and Free T3 levels are excellent, and I feel good, yet she recommended lowering my dosage because my TSH level is on the low side. I know Hashimoto's patients should not rely on TSH levels to stablize their meds, but she said it is because I am on desiccated, and if I were on synthetic it would be different. (?)

I'm on a lower dosage for two months, and then we will do more tests. I'll post an update then, but am wondering if anyone has ever heard of this?