Standard tests for hypothyroidism do not usually measure testosterone levels. Instead, they measure thyroid-stimulating hormone (TSH) and thyroxine (T4). High TSH and low T4 are common indicators ...

If your reverse T3 levels are > 15 or your free T3 to reverse T3 ratio is < 0.2, then you are likely suffering from thyroid resistance. In this case, you would need to switch from T4 therapy to T3 ...

To confirm hypothyroidism, a doctor will typically perform a follow-up test that measures your levels of T4, the main form of thyroid hormone circulating in the blood. A high TSH level and a low ...

The amount of T4 produced by your thyroid gland is controlled by the levels of TSH production by your pituitary gland. Therefore, if your pituitary gland sees very little T4, it will produce more ...