游离t3t4是什么意思查什么的

游离t3t4低

```htmlUnderstanding T3 and T4 Levels in Thyroid FunctionUnderstanding T3 and T4 Levels in Thyroid FunctionThyroid hormones T3 (triiodothyronine) and T4 (thyroxine) play crucial roles in regulating metabolism, growth, and energy levels in the body. Abnormal le...