Asking this is isolation from other facts about your case is really not a great thing and with 12 threads in this forum a review of past traffic is not reasonable.
Start small and monitor body temperature response, alertness and clarity of thought. If you feel overheated or jittery, too much.
Effects can build over days. Making dose increases based on short durations might be a bad idea.
While you are bypassing some iodine needs, do not neglect selenium.
Natural product yes, but no advantage over a product that could have equal amounts of man made T3, T4. Bio-identical is the key concept. The advantage is mostly VS T4 only meds which comes to advantage for those who convert T4–>T3 poorly in peripheral tissues. T4–>T3 can be impeded when ferritin is low which is more of a problem with women and not expected with otherwise healthy males. Some who are poor at peripheral T4–>T3 probably gave genetic variations that effect key enzymes or gene expression for those enzymes.