THYROID | GUT
Your thyroid produces mostly T4, which is inactive. It needs other tissues, like your gut to convert it to its active hormone T3, which is responsible for your energy, metabolism, body heat and much more.
About 20% of thyroid hormone conversion takes place in the gut and it is the job of your healthy gut flora to make sure you get the amount of T3 you need.
If your gut is not functioning optimally you can experience symptoms of hypothyroidism, even if your thyroid is healthy.