Not yet investigated
What we have so far
Pig thyroid, standardised by iodine content rather than by hormone, at a T4:T3 ratio of about 4:1 where a human runs closer to 14:1.
This star is on the map because the show intends to take the question apart properly — the trials, how it is actually tested, whether the thing sold is the thing studied. That work is not done yet, and nothing here should be read as a conclusion. When the investigation is published it will appear on this page.