From the Dicana FAQ
So Dicana is safe, but is it effective?
Yes! The beauty of Dicana is that it is able to give you the right amount of each thyroid hormone to give you noticeable fat burning results, but thyroid suppression will be minimal, and the thyroid is able to rebound quickly to mild suppression, so quickly that you will not notice any effects of suppression.
hey thanks for clearing all that up, much appreciated.