TPO is a key enzyme in the synthesis of thyroid hormone responsible for catalytic oxidation of iodine and iodization of tyrosine, and inhibition of TPO activity can directly lead to reduced thyroid hormone synthesis (Godlewska and Banga, 2019)
In experimental models, this pulsatile GH elevation activates hormone-sensitive lipase and promotes lipolysis specifically in deep abdominal fat depots
Ighodaro OM
Rhee CK, Chau NQ, Yunus F, Matsunaga K, Perng DW, on behalf the CAotA
However, they also have limitations: many are unstable in the gut, so they are often given by injection, and some have limited human data outside of specific indications
Nutritional deficiencies, especially iron and Vitamin B12, can also play a role