The next thing you’ll hear about are optimal levels of T3 and T4. There is a popular argument that these hormones need to be on “the high side of normal.”
Given the assumption that the TSH, when compared to T3 and T4, are the opposite of one another, that can begin to make sense. But, is it true?
The evidence doesn’t think so. The inverse relationship between the TSH and T3/T4 is only true at the extremes (when you have way too much or way too little).
Between those extremes, that inverse relationship doesn’t really exist. For healthy people, their T3 and T4 levels can be all over the place. It’s totally normal and fine.
Subclinical Hypothyroidism
In the world of suboptimal hypothyroidism, we were discussing splitting hairs within what we’d consider a normal range. Now, we’re outside of that normal range.
In this stage, your TSH is elevated. Most ranges say that it is normal up to 4.5, but with subclinical disease, it is higher – almost as high as 10 or 20.
But, the T4 is not way below range (it is somewhere in range). This is what we know as subclinical hypothyroidism.
As it happens, in the conventional world, this is where most folks are identified as having thyroid disease and subsequently put on thyroid medication. But, is that truly beneficial?
Again, the data doesn’t think so. Studies have found that it doesn’t lower the effect of symptoms, health risks, or even the progression to other versions of thyroid disease.