A friend of mine directed me to an article they figured I might be interested and I thought to share it here too:
Five Reasons Why You Should Probably Stop Using Antibacterial Soap
The relevant section is reason no. 3:
"3. The soaps could act as endocrine disruptors. A number of studies have found that, in rats, frogs and other animals, triclosan appears to interfere with the body’s regulation of thyroid hormone, perhaps because it chemically resembles the hormone closely enough that it can bind to its receptor sites. If this is the case in humans, too, there are worries that it could lead to problems such as infertility, artificially-advanced early puberty, obesity and cancer.
These same effects haven’t yet been found in humans, but the FDA calls the animal studies “a concern”—and notes that, given the minimal benefits of long-term triclosan use, it’s likely not worth the risk."
I thought reading the above they were maybe implying that triclosan could be impairing cellular uptake of thyroid hormones, such as with cellular resistance to T3, but they linked two studies and the second one of which I read the abstract for sounded more like it decreased Serum T3 and Serum T4 concentrations (in rats at least).
I guess the point here is probably not enough is known about what Triclosan is doing and it might be worth considering cutting these out of your routine if you are a thyroid patients if in fact normal soap and water isn't likely to do much worse of a job of cleaning/sanitising our hands.