What Is Hypothyroidism?
I want to start by grounding today’s discussion in a clear definition of hypothyroidism. There are different degrees of it, but many of the things that we think of as hypothyroidism do not come specifically from a lack of thyroid hormones.
We mostly define hypothyroidism based on three things:
- Thyroid stimulating hormones (TSH)
- T3
- T4
The TSH is a backward indicator, and your pituitary asks your thyroid to get to work. If your thyroid begins to slow down, your pituitary gland “yells” at it through TSH.
Regarding TSH, there is a normal and optimal range (far more narrow). Many folks are simply not in that optimal range when they need to be (we call that suboptimal hypothyroidism).
There are also those with elevated TSH, but the thyroid is still making hormones. We call that one subclinical hypothyroidism.
Finally, we have overt hypothyroidism. That is where the thyroid has essentially quit, and it is making none or virtually no thyroid hormones. At this point, the TSH is elevated way above the normal range.